Before final connection of the water heater purge gas, hot water and
cold water supply lines. Swarf in either the gas or water supplies may
cause damage.
Turn on gas and cold water supplies.
Test for water leaks and gas escapes near the unit.
Isolate gas supply. Remove test point screw located on the gas inlet
connection and attach pressure gauge.
Turn the power 'on' at the power point socket and turn on gas.
Open all available hot water taps. (CAUTION: Ensure building
occupants do not have access to hot water outlets during this
procedure.)
Operate ALL other gas appliances at their maximum gas rate, in
accordance with manufacturers instructions.
With all gas appliances in operation at maximum gas rate, check the
inlet gas pressure. If the pressure is lower, the gas supply is inadequate
and the appliance will not operate to specification. It is the Installers
responsibility to check the gas meter, service regulator and pipe work
for correct operation/sizing and rectify as required. Note that the gas
regulator on the appliance is electronically controlled and factory pre-
set. Under normal circumstances it DOES NOT need adjustment during
installation.
Close hot water taps including the shower.
Inspect and clean the strainer located on the cold water inlet
connection. This procedure may need to be repeated to ensure the
strainer remains clear, especially on new installations.
If Temperature Controllers are fitted, it is necessary to test their
operation through the complete range of functions. (Refer to the 'How to
use your Water Heater' booklet.)
Confirm the hot water delivery temperature(s) using a thermometer. If
controllers are fitted, ensure temperatures exceeding 50˚ C cannot be
selected on bathroom or ensuite controllers.
After testing is completed, explain to the householder the functions and
operation of the water heater and temperature controllers (if fitted).
TESTING AND COMMISSIONING
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
AC weatherproof external earthed power point is required within 1500 mm
of the appliance.
The appliance weighs approx. A, depending on the wall on which it is to be
mounted must be capable of supporting it and associated pipework. Ensure
that suitable fixing screws or bolts are used to secure the appliance to the
wall. Bracket and fixing hole locations are shown overleaf.
The top bracket has a keyhole slot so that the appliance can be positioned
by hanging it on one screw, then the other screws can be secured. After
determining the most suitable position, fix the appliance to the wall.
Connect hot and cold water and gas pipes. Approved valves MUST BE
FITTED to both the cold / hot water pipes and the gas inlet.
In areas where the water pressure is over 1000 kPa, a pressure limiting
valve must also be fitted. the gas connection is B, the cold water inlet and
hot water outlet connections are C. Locations are shown overleaf.
The appliance range can use up to Dof gas.
IF THE GAS PIPE SIZE IS INSUFFICIENT, THE CUSTOMER WILL NOT
GET THE FULL PERFORMANCE BENEFIT. An approved isolation valve
MUST BE FITTED to the gas inlet. Connection size is B. This is NOT an
indication of the size of pipe required. Check the data plate for gas inlet.
This appliance is not suitable for use as a pool heater.
Never connect an earth wire to gas supply line.
This appliance is for OUTDOOR use.
INSTALLATION-GENERAL
REU-VRM2632WC / VRM3237WC
POSITIONING
This external model is an externally mounted, power flued appliance.
IT MUST ONLY BE FITTED OUTSIDE THE BUILDING.
When determining a suitable position for the appliance, the length of hot
water pipe runs should be taken into consideration. In principle, the
appliance should be as close as possible to the most often used taps, or in
a central location between taps, showers etc.
See diagram overleaf for position of gas, water and power connections.
The location of the flue terminal must comply with the clearances shown in
the following diagram.
Min. clearances
(mm)
Ref. Item
Fan assisted
Below eaves, balconies and other projections:a
·Appliances over 50 MJ/h input 300
b From the ground, above a balcony or other surface †300
c From a return wall or external corner †300
d From a gas meter (M) 1000
e From an electricity meter or fuse box (P) 500
f From a drain pipe or soil pipe 75
g Horizontally from any building structure †or obstruction facing a
terminal 500
h From any other flue terminal, cowl, or combustion air intake †300
Horizontally from an openable window, door, non-mechanical air inlet, or any other opening
into a building with the exception of sub-floor ventilation:
·Appliances up to 200 MJ/h input 300
·Appliances over 200 MJ/h input up to 250 MJ/h input † 500
·Appliances over 250 MJ/h input † 1500
j
·All fan-assisted flue appliances, in the direction of discharge 1500
k From a mechanical air inlet, including a spa blower 1000
Vertically below an openable window, non-mechanical air inlet, or any other opening into a
building with the exception of sub-floor ventilation:
·Space heaters up to 50 MJ/h input 150
·Other appliances up to 50 MJ/h input 500
·Appliances over 50 MJ/h input and up to 150 MJ/h input 1000
n
·Appliances over 150 MJ/h input 1500
P
See note 2
T = Flue terminal
I = Mechanical air inlet areas for flue terminals
Shading indicates prohibited
M = Gas meter
P = Electricity meter or fuse box
A(the appliance weights) 19kg
VRM2632WC
R3/4(20mm)
R3/4(20mm)
199MJ/h
29kg
VRM3237WC
R3/4(20mm)
R3/4(20mm)
250MJ/h
B(gas inlet)
C(cold / hot water pipes)
D(input)
1
† Unless appliance is certified for closer installation
note 1. All distance are measured to the nearest part of the terminal.
note 2. Prohibited Area below electricity meter or fuse box extends to
ground level.
DIMENSIONS (VRM2632WC)
DIMENSIONS (VRM3237WC)
2
