Optional Lphw - Calorex monitair DH44 Series Owners & Installation Manual

4.2 OPTIONAL LPHW

Connect th e fl ow and return water circuit pipe work by means of th e 15mm stubs which are
provided on th e side of th e machine. The connections project 40mm out from th e left hand side
of th e DH44 and th e right hand side of th DH66.
Attention!
The 3 way, motorised, diverting valve fi tted to machines with th e LPHW option is operated
by a remote 12V AC air temperature th ermostat (available from Calorex).
When th e valve is energised th e fl ow is th rough th e LPHW coil.
When th e valve is unenergised th e fl ow is diverted.
NOTE :- When th e fan switch is set to cycle and th e fan is not running, a demand on th e
LPHW valve will cause th e fan to automatically start.
LPHW PLUMBING SCHEMATIC
BOILER
COOL
WATER OUT
HOT
WATER IN
Flow - bottom connection
Return - top connection
PUMP
RADIATORS IF FITTED
22
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
SD496251 iss 9