Optional Lphw - Calorex DH44 Technical Manual

4.2 OPTIONAL LPHW

Connect the flow and return water circuit pipe work by means of the 15mm stubs which are
provided on the side of the machine. The connections project 40mm out from the left hand side
of the DH44 and the right hand side of th DH66.
Attention! Flow - bottom connection
Return - top connection
The 3 way, motorised, diverting valve fitted to machines with the LPHW option is operated by a
remote 12V AC air temperature thermostat (available from Calorex).
When the valve is energised the flow is through the LPHW coil.
When the valve is unenergised the flow is diverted.
NOTE :- When the fan switch is set to cycle and the fan is not running, a demand on the LPHW
valve will cause the fan to automatically start.
LPHW PLUMBING SCHEMATIC
BOILER
PUMP
RADIATORS IF FITTED
COOL
WATER OUT
HOT
WATER IN
22.00
DH44
LPHW INLET AND OUTLET POSITIONS
3 WAY MOTORISED VALVE
CONTROLLED BY CUSTOMERS
THERMOSTAT
DH66
Page 10
LPHW
CONNECTIONS
LOCATED ON
DEHUM CABINET
COOL
WATER OUT
HOT
WATER IN
22.00
SD496260 ISSUE 10