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OPERATION

A recommended humidistat setting (50-60% RH) is a mid way point on 
th e dial (Green segment on label).
Minimum Air Temp DH30/33/50/55 A = 15ºC
Minimum Air Temp DH30/33/50/55/ AX = 0ºC.
Note on “X” models th e fan stops during defrost.
On machines with  resistance heaters DH30/50 “P” heating control is 
governed by th e remote mounted air th ermostat, adjust to desired air 
temp, heater will run automatically as required.
On machines with  LPHW,fans will start automatically as required.

MAINTENANCE

a) Ensure air inlets/outlets are kept clear and clean. Filter kits are 
available.
b) Wipe clean with  damp cloth  or cleaning fl uid suitable for fi breglass 
and/or PVC.
c) Ensure drain line is kept clear.
Note: Thre reply paid Warranty Registration Card must be returned to 
ensure th e correct warranty is given. If you do not fi nd a Registration 
Card with  your machine please contact CALOREX Service Department 
giving your name, address, and th e serial number of your machine. A 
card will be sent to you for completion.

HEALTH AND SAFETY WARNING

As th e heat pump contains electrical and rotational equipment, it is 
recommended th at ONLY competent persons carry out any work on th is 
type of machine (see guarantee).
Isolate machine electrically before entering machine or removing panels.

MACHINE NOT RUNNING AT ALL

CHECK THE FOLLOWING 
1 Is 

th e supply switched on?

2 Is 

th e supply fuse health y?

Turn humidistat knob fully anti-clockwise.

Check air inlets and outlets for obstructions.

ON P models reset th e th ermostat(s) see FIG 2.

If aft er carrying out th e above and waiting one hour, th e machine 

does not start, phone for service.

MACHINE FAN ONLY RUNNNING

Turn humidistat knob fully anti-clockwise.

Check air inlets and outlets for obstructions, if aft er 30 minutes th e 

machine has not restarted, phone for service.

WATER LEAKING FROM BASE OF UNIT

Check connection from machine to drain for blockages and clear 

accordingly, check fall is adequate.
10 Check 

th e machine is level, both  vertically and horizontally.

The user check list should be carried out before initiating a service call.
Do not attempt to interfere with  any internal control settings as th ese 
have been factory calibrated and sealed.

If in doubt or if advice is required, contact Calorex Service Department 
Telephone (01621) 857171 or 856611

PLEASE LEAVE INSTRUCTIONS FOR USER

E

N

L

N

L

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PLUMBING CIRCUITS HEAT RECOVERY MODELES 'RH' 

HEAT RECOVERY TO POOL/SPA

DRAIN

DRAIN

DESHUMIDIFIED SPACE

3PSI
NRV

SANITISER

PUMP FILTER

DEHUMIDIFIER

HEAT RECOVERY TO WATER

WATER 

PUMP

COLD WATER 

FEED

HOT WATER 

CYLINDER 

INSULATED

HOT WATER 

DRAIN OFF

CYLINDER 

STAT

WATER CIRCUIT

COMPONENTS REQUIRED
INSULATED DIRECT HOT WATER 
CYLINDER
WATER PUMP, THERMOSTAT
INSULATED PIPING

ELECTRICAL SUPPLY CIRCUITS 

LPHW PLUMBING SCHEMTIC

DEHUMIDIFIER

INCOMING SUPPLY. CAPACITY TO SUIT 

PUMP AND DEHUMIDIFIER

AUX 

FUSEBOARD

ISOLATOR 

TO SUIT 

PUMP

WATER 

PUMP

WATER PUMP IS FOR HEAT RECOVERY, 

POOL/SPA OR HOT WATER APPLICATIONS

SINGLE PHASE 
LOCAL ISOLATOR.
CAPACITY TO SUIT DEHUIDIFIER

BOILER

PUMP

RADIATORS IF 
FITTED

FLOW METER

VANNE MOTORISEE A
3 VOIES COMMANDEE PAR 
THERMOSTAT CLIENT

FLOW BALANCE 
VALVE

LPHW 
CONNECTIONS 
LOCATED ON 
DEHUM CABINET

USER CHECK LIST

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