andrews 24/39, Installation Manual, Operation And Service Manual

Page: 9 / 96

9
INSTALLATION SECTION 3
The heater must not be installed in any location which contains a bed, bath or shower.
There must be easy access to the boiler room and heater at all times.
A clearance of 800mm (31 1 ⁄
2
in) for Hi-Flo and 300mm for Standard Range should be left
at the front of the heater for removal of the burner.
Clearances at the sides and rear of the heater should be at least 305mm (12 in).
Service clearances for removal of the anodes and flue baffles should be provided as
detailed below.
STANDARD RANGE
Models 24/39, 32/40, 40/61 762mm (30 in)
Model 63/62 1143mm (45 in)
Model 84/87 1270mm (50 in)
HI-FLO RANGE
Model 32/143 597mm (23
1
⁄
2
in)
Model 81/264 1300mm (52 in)
Models 65/173, 62/341, 54/418, 54/440 1143mm (45 in)
The floor on which the heater is installed must be non-combustible, flat, level and of
sufficient strength to withstand the weight of the heater filled with water (see Section 2,
Technical Data) and should satisfy the requirements of the Local Authority and Building
Regulations.
NOTE:
If the heater is in an exposed position and out of use during a period of heavy frost, it is
recommended that the whole system is drained down to prevent damage due to the
formation of ice inside the storage vessel.
THE ANDREWS WATER HEATERS COVERED IN THIS MANUAL MUST
ONLY BE USED WITH NATURAL GAS.
The installation of the gas supply must conform, depending on it's size, to the
requirements of British Standards and Codes of Practice listed in Section 1 of this manual.
A gas meter will be connected to the service pipe by British Gas plc or it's authorised
contractor.
The meter and service pipe should be checked by British Gas or it's authorised contractor
to ensure that they are adequate to deal with the gas supply to the water heater(s) in
addition to any existing or additional requirements.
Gas Supply Cock, Standard Models
Fit the gas supply cock immediately upstream of the gas control thermostat using a
suitable jointing compound and connect to the gas supply. Do not apply heat in close
proximity to the gas thermostat as damage to the control will result. A pressure test point
nipple is fitted to the gas control thermostat at the gas inlet to test the incoming gas
pressure.
LOCATION
GAS SUPPLY