8
3.3 PLUMBING - CISTERN FED
1. This method of installation must be used if the outlet is to be connected
to one or more conventional taps. It is not recommended for suppling
a shower. Individual site demands should be considered when choosing
the number of outlets to be served.
2. A vent pipe must be connected to the outlet connection of the heater.
3. The vent pipe must have a minimum internal diameter of 19mm.
4. The vent pipe must be unobstructed, rise continously and be arranged
to discharge over the cold water feed cistern. DO NOT connect any
pressure relief device to the vent pipe of this water heater.
5. The cold water supply must be from a cold water feed cistern complying
with Byelaw 30. The maximum head pressure must not exceed 20
metres.
6. It is recomended that an WRC Listed isolating valve is fitted on the cold
water supply to the heater. A drain cock should be fitted on the inlet
pipe to the heater at a level lower than the unit to allow draining for
maintenance.
7. The inlet must not be connected directly to the cold water mains
supply.
8. The Vent Pipe should be connected to the top of the heater using the 15
x 22mm Push Fit Straight Connector supplied.
FIGURE 03: TYPICAL OPEN OUTLET INSTALLATION
FIT PUSH FIT CAP
(SUPPLIED)
OUTLET SPOUT
(SUPPLIED)
INLET VALVE
(SUPPLIED)
COLD WATER
SUPPLY
ISOLATING VALVE
(NOT SUPPLIED)
DRAIN COCK
(NOT SUPPLIED)
