Andrews WH and WHX Multiple Water Heater Installation with ST Range Storage Cylinder,
Quick Connect Cord Kit and Secondary Return
Fig No.11
Remote controller
set to 70ºC
Gas
Supply
Pump
(See Fig. No’s. 12/13)
Quick connect
cord kit (part no.
B286)
HWS flow
Storage
cylinder
Tank thermostat kit (part
no. C927) set to 65ºC
Bronze secondary pump
Cold Supply
NB. Size mains pressure group to
suit building design flow rate
Gas rate for NG units
WH42 - 5.1 m
3
/hr
WH56, WHX56 - 6.5 m
3
/hr
Gas rate for Propane units
LWH42 - 1.9 m
3
/hr
LWH56, LWHX56 - 2.5 m
3
/hr
Dynamic Pressure
NG 20 mbar
Propane 37 mbar
1
2
3
4
5
6
7
1. Stop cock
2. Strainer
3. Pressure reducing valve
4. Non return valve
5. Expansion vessel
6. Expansion valve + tundish
7. Andrews bronze pump c/w
ball valve unions (part no.
B249)
8. Combined temperature
and pressure relief valve
+ tundish
Hot Outlets
Please refer to the
FASTflo Specification
Sheet and Flue Selection
Guide for Flue Kit and
termination details
8
Summary of Contents for WH42
Page 18: ...Dimensions WH42 LWH42 WH56 and LWH56 Fig No 15...
Page 19: ...Dimensions WHX56 and LWHX56 Fig No 16...
Page 20: ...WH42 LWH42 WH56 and LWH56 Pre assembled dual manifold unit dimensions Fig No 17...
Page 21: ...WH42 LWH42 WH56 and LWH56 Pre assembled triple manifold unit dimensions Fig No 18...
