M&E Building User guides

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Electrical User Guide

Morpeth First School
Morpeth

NE61 2DB

MAIN CONTRACTOR SUB – CONTRACTOR

BAM Construction McNally & Thompson
Boston House Unit 1
5th Avenue Business Park North Hylton Enterprise Park
TVTE North Hylton Road
Gateshead Sunderland
NE11 0HF SR5 3AD

Tel:- 0191 4874897 Tel:- 0191 549 6843

Main Index

Distribution
Fire Alarm
Disabled Refuge System
Intruder Alarm
Access Control
Disabled Toilet Alarm
CCTV

DISTRIBUTION

The incoming electric point into the building is located in the main electrical switch room to the side
of the school. Main protection fuses are 400amp. The CT chamber to the side of the section board
has the electric meter for the whole building mounted on the front.

This is the main section board located in the electric switch room. It transfers power to the various
distribution board via MCCB protective devices.
There are meters mounted on the front of this panel to record electricity consumption for various
distribution boards and mechanical control panel.

This is the distribution board arrangement for the main hall. Lighting on the left, power on the right,
meter enclosure below the lighting. Doors are locked to prevent unauthorised access. Circuit charts
are installed inside the cover lid.

Riser distribution arrangement

Inside the distribution board front cover displays the protective devices, the main switch, MCB’s and
RCBO’s.
In the event of a circuit going off (tripping out), carry out the following;
Visual inspection of the area where the power has gone off. If there is anything obvious ie water
ingress, damage to an area they stop and call a qualified person.
If nothing obvious on the lighting circuit then try to switch on the RCBO at the distribution board to
see if it switch on and hold on. If it does then great, if it trips out then stop and call a qualified
person.
If nothing obvious on the power then go round and unplug all equipment form the sockets then try
to switch on the RCBO at the distribution board to see if it switch on and hold on. If it does then
great, if it trips out then stop and call a qualified.

The meters are located behind the door on the meter enclosure. These meters are for separate
lighting and power sides of the Distribution Boards.
These meters can be easily read for power consumption and it’s worth logging all the readings.

























Morpeth School Mechanical Building Services User Guide

LTHW Heating System

The heating for the school is provided by a low-pressure hot water system with the
heat being generated via 3N Ideal Evomax 60 fully modulating, condensing, pre-
assembled wall mounted condensing boilers complete with conventional flue
system, pressurisation unit and twin head inverted driven pump.

From the plantroom the low-pressure hot water system is distributed throughout
school via copper pipework with press fit fittings to the various radiators and radiant
ceiling heating panels all as identified on ‘as-installed’ drawings.

Ventilation Systems

Kitchen Supply & External System
The kitchen canopy has a dedicated Swegon AHU and extract fan located
externally at roof level. The kitchen extract system is interlocked with the gas supply
to kitchen via a gas control panel as identified on ‘as-installed’ drawings.

Mixed Mode Ventilation Systems
Breathing Buildings mixed mode units are installed within the majority of occupied
spaces. The mixed mode units deliver fresh air to the space during winter months
without causing draughts by mixing the room internal air with external air. Each unit is
controlled individually via CO2, internal and external temperature sensors.

NVHR 1A-2 Operation

General
The external temperature is monitored differentiate between winter time and
summer time operating modes. These modes are set at an external temperature of
17 C̊ . This is the Winter/Summer Cross Over (WSX) set point.

All set points have an associated hysteresis such that commencement of operation

is only cancelled by dropping below the original set point. E.G. There is a 50ppm
hysteresis in the system’s response to CO₂ so that if the unit starts to operate at
600ppm, it remains operating until the CO₂ concentration falls to 550ppm.

Winter Mixing

In winter time mode, when the external temperature is
below the WSX set point, the low-level openings in the
rooms, signalled by the indicator being “Off” on the
control interface, will be closed.

The ventilation unit controller monitors the CO₂

concentration and room temperature within the room
and operates such that, when CO₂ rises above 600ppm or room temperature
exceeds 23.5 ̊C, the two fans in each ventilation unit will run. One fan sets the

direction for fresh air to enter the room, while the second fan pulls warm air from the

room. The air from both fans enters the mixing chamber and the mixed air stream is
ducted into the room through the rear of the unit. Stale air is exhausted through the
lower vent slots of the unit, driven by buoyancy through the front of the unit and the
external weather louver. The damper will open when ventilation is required, the
opening amount dictated by a cold draught prevention technique.

Summer Displacement

The ventilation unit controller is in Summer time mode
when the external temperature is above the WSX set
point. It will start the unit to ventilate when CO₂
concentration rises above 600ppm or the Room
temperature exceeds 21 C̊ .

The damper on the unit will open fully and the indicator
on the control interface will illuminate to indicate that the low level openings should
be opened to admit fresh air, air will be admitted through the low level openings
and stale air, driven by buoyancy, will exhaust through the unit and external
weather louver.

Summer Boost If CO₂ rises above 600ppm or room temperature
exceeds 23.5 ̊C, the natural displacement ventilation

is assisted by running one fan to increase the
ventilation rate. This mode of operation is often
referred to as summer boost and is also used in “Night
Cooling.”

Night Cooling
Night Cool mode can operate during the period 1st May – 30th September between
9pm and 6am and is activated by the external temperature exceeding the 24 C̊
(Night cool Trigger Set Point) the previous day. The external temperature must also
be less than the internal temperature, and internal temperature must be above 18 C̊
(Minimum Night cool Set Point) in order for night cool to run. The system evaluates
the fall in temperature during the night and can enable the NVHR fan to run in full
speed between 3am and 6am for maximum air flow.

During hot summer days, but lower than the Night cool Trigger Set Point, the e-stacks
can be tricked into activating a night cool by the BMS (by the BMS momentarily
sending above 24 ̊C) if it monitors a high room temperate during the day. This is
controlled by the BMS.

Off Mode

No ventilation occurs when the system is turned to OFF mode. Any actuated
windows close and the indicator is not are illuminated.

NVHR 1A-2 Operation Graphical Representation

Key to shaded regions in numbered blue circles

Standard Key Switch
The key switch panel may be provided with (Type1) or without (Type2) an
illuminating “Open Windows” indicator, and is used for system control and
maintenance purposes (OFF or ON: Auto or TEST, TIMED “MAX VENT” or “DISABLE”)
and is not an electrical isolator.

Type 1 Type 2

On – Off
“ON-OFF” switch is used to activate the key switch functions and the Breathing
Buildings system ventilation a space. It is recommended that the system be left in the
“ON” position. If the system is switched “OFF” then night cooling will not take place.
The system should only be “OFF” during extended unoccupied periods (school
holidays) or prior to initiating the “TEST” function.

Auto – Test
For the system to operate in “AUTO” mode the “ON-OFF” switch must be in the “ON”
position. Likewise, in order to initiate the “TEST” mode the “ON-OFF” switch must be in
the “ON” position.

Auto
In “AUTO” the system will operate in Summer or Winter ventilation mode depending
on the prevailing conditions.

Test
Prior to initiating the “TEST” function it is recommended the “ON-OFF” switch be set
to “OFF” so as to ensure that dampers and fans are inactive prior to initiation; the
system should be set to “TEST” prior to being set to “ON”. In “TEST” the system will
exercise each mechanical component under the control of the system in a
predetermined order. Once the test sequence is complete all fans will be
unpowered, unit and wall dampers – If fitted – will be held open, permitting routine
maintenance to be carried out. See Maintenance section.

Timed Max Vent and Disable
This switch enables the occupants to override the operation of the system when in
“AUTO” mode, affecting the level of ventilation within the room. Note: The TIMED “
MAX VENT” – “DISABLE” switch is a non-latching switch which, after activation, will
automatically return to its centre position.

Timed Max Vent
Pressing the top of the switch engages the “MAX VENT” function, when the system
will vent at its maximum capability. With the “MAX VENT” activated the “OPEN
WINDOWS” indicator will flash, indicating that this function has been activated.
Maximum ventilation will be maintained for a pre-programed time – typically 30
minutes – or until the function is cancelled, by pressing the bottom of the switch,
when the system will revert to its standard mode of operation.

Timed Disable
Pressing the bottom of the switch will engage the “DISABLE” function, when the
system will stop ventilating the room. With the “DISABLE” activated the “OPEN
WINDOWS” indicator is “OFF” indicating that the rooms manually actuated openings

should be closes. Ventilation disable will be maintained for a pre-programmed time
– typically 30 minutes – or until the function is cancelled, by pressing the bottom of
the switch, when the system will revert to its standard mode of operation.

Window Indicator
The user interface, positioned on the wall of the room, uses an illuminated indicator
to advice the occupants when the windows should be opened or closed. When the
key switch is turned in AUTO, the indicator will light depending on the ventilation
strategy that the internal control system adopts. The indicator is also used to
indicated if the unit is in TEST or other service modes.

Heat Recovery Units
Ventilation to internal rooms that require mechanical ventilation is provided via
ceiling mounted units located within 1st floor ceiling voids. Intake and exhaust air is
taken from roof mounted cowls and each supply and extract connection is
provided with a volume control damper. The units introduce fresh air into the spaces
via ceiling mounted diffusers and exhaust air is removed via ceiling mounted extract
grilles. These units are operated via BMS on time schedule.

Local Extract System
Local extract systems are provided to toilet areas, cleaner rooms etc as indicated
on drawings.

Air Conditioning Systems

Community Room
Heating & cooling is provided by an inverter type heat pump system which
comprises of external condenser unit and internal ceiling mounted units as identified
on ‘as-installed’ drawings.

Server Room
Cooling is provided by an inverter type heat pump system comprising of external
condenser unit and internal wall mounted unit on ‘as-installed’ drawings.

C641-0906- Simplified Instructions for the RBC-AMS41E
Remote Controller

Setting Present Time and Day of Week

Press and hold SCHEDULE for 4 seconds, (setting appears on
screen)

Press DAY until the correct day of the week is indicated.
Press TIME up and down keys to set current time
Press SET to confirm entries. Day and time now set.

Setting ON and OFF Times (scheduled operations)

1. Press PROGRAM, display will flash PG-01

2. Press DAY until Monday is selected then Press SET

3. Press SET, PG-01 will stop flashing

4. Press TIME up and down keys until required ON TIME is displayed

5. Press SCHEDULE until blinks (symbol denotes start operation

6. Press SET

7. Press UNIT, PG-02 will appear

8. Press SET, PG-02 will stop flashing

9. Press TIME up and down keys until required OFF TIME is displayed

10. Press SCHEDULE until blinks (denotes stop operation)

11. Press SET and then PROGRAM

The bar now underlining MONDAY indicates that times have now been entered.

Copying from Monday to Remaining Days of Week

1. Press PROGRAM, display will flash PG-01
2. Press DAY key and select Monday
3. Press SET
4. Press UNIT key until PG-CP appears (program copy)
5. Press SET
6. Press DAY and select Tuesday
7. Press SET (Monday times have now been copied into Tuesday) to continue
copying return to step 4
8. Press PROGRAM

The times have now programmed into the controller

N.B. To activate the programmed times press SCHEDULE, will flash,

Press SET, remains displayed, scheduled programming now activated.

To deactivate the programmed times, press SCHEDULE, will flash,

Press CL, disappears from screen.

Time, Temperature and Mode Selection when Programming the RBC-AMS41E

Setting Present Time and Day of Week

Press and hold SCHEDULE for 4 seconds, (setting appears on screen)
Press DAY until the correct day of the week is indicated.
Press TIME up and down keys to set current time
Press SET to confirm entries. Day and time now set.

Setting Scheduled Operations with Mode and Temperature functionality

12. Press PROGRAM, display will flash PG-01
13. Press DAY until Monday is selected then Press SET
14. Press SET, PG-01 will stop flashing
15. Press TIME up and down keys until required ON TIME
is displayed
16. Press MODE key selecting desired mode of
operation
17. Press TEMPERATURE up & down arrows to set desired
temperature

18. Press SCHEDULE until blinks (symbol denotes

start operation

19. Press SET

20. Press UNIT, PG-02 will appear

21. Press SET, PG-02 will stop flashing

22. Press TIME up and down keys until required OFF TIME

is displayed

23.. Press SCHEDULE until blinks (denotes stop operation)

24. Press SET and then PROGRAM

The bar underlining MONDAY indicates that times have now been entered

Copying from Monday to Remaining Days of Week

9. Press PROGRAM, display will flash PG-01
10. Press DAY key and select Monday
11. Press SET
12. Press UNIT key until PG-CP appears (program copy)
13. Press SET
14. Press DAY and select Tuesday
15. Press SET (Monday times have now been copied into Tuesday) to continue
copying return to step 4
16. Press PROGRAM

The times have now been programmed into the controller

N.B. To activate the programmed times press SCHEDULE, will flash,

Press SET, remains displayed, scheduled programming now activated.

To deactivate the programmed times press SCHEDULE, will flash,

Press CL, disappears from screen.

Domestic Water System

Mains Cold Water System
A new portable mains cold water system in installed from the incoming mains supply
service into the plant room and routed through the building to serve all sanitaryware
fixtures, water coolers, kitchen equipment, hot water heaters & pressurisation unit.

Back flow prevention devices are fitted where required to prevent contamination at
the local water authority mains.

Domestic Hot Water System
Domestic hot water services are provided by 2N. Andrews Maxxflo CWH 30/300 gas
fixed water heaters and pipework services are routed through the building to serve
all sanitaryware fixtures & fitting.

Natural Gas Installation
A new gas supply system is installed from the incoming gas main service in the
plantroom and is routed through the plantroom to serve the heating boilers and
water heaters and then through into the kitchen all as identified on ‘as-installed’
drawings.

Above Ground Drainage

A complete soil and waste system is provided to all appliances in the building and
these routes are all identified on ‘as-installed’ drawings.

Fire Protection System

A water sprinkler protection system has been installed and commissioned by
Armstrong Priestley who have provided their ORM information which is contained
within later section of this manual.

Auto-Controls Installation

The whole of the control’s installation has been supplied and commissioned by EON
controls. Full details provided within later section of this manual.