Installation instructions
DH75/DH110 RANGE
Installation model DH75/110
1. Remove machine from packaging and set on a level surface.
Check that machine is level both vertically and horizontally.
2. Remove covers as shown in FIG.1 relative to machine type
installed.
3. The Electrical supply to unit must be sized according to the
data on the serial number label, paying close attention to
I.E.E regulations latest edition regarding the special conditions
governing electrical supply to machines in potentially damp
areas (DH75/110 are IP45).
4. The electrical supply should be connected to the terminals
on the Printed Circuit Board in the electrical box found in
the top corner of the machine, see Fig1 & Fig4. Wires to be
connected as follows: brown/red to live, blue/black - to neutral,
and green/yellow to earth.The fan mode switch can be set
to cycle fan when Hygrostat senses demand but should be
set to continuous to promote good air circulation and reduce
condensation.
Note that on models fitted with LPHW and or remote hygrostat
the fans will start automatically whenever there is an air heating
or dehumidification demand. During defrost the fans will stop. (Fan
cycle not recommended for TTW machines with humidistat only).
Set Fan Speed switch to “High” for maximum duty, “Low” for minimum sound.
5. Locate drain, 15mm compression fitting, on side of unit and run
it away to waste as preferred. A single hole is provided in the
side of the unit. The drain is factory fitted to this hole. (In TTW
machines there is an alternate position - see drawings).
Models with LPHW fitted
6. Connect water circuit piping to the 22mm stubs provided on
the side of the machine as per diagram.
7. It is recommended that isolation valves are fitted to enable
isolation of the machine in the event of service.
The Circulating Pump must be sized to take into account
the design flow rate of the machine plus the water system
resistance. (Flow Rate 9.6 l/min Pressure Drop 2.8 m/hd).
Please leave these instructions for the user.
Fig 1
Standard &
TTW machine
Standard
machine
Mains in
terminals on
printed circuit
board
Safety
Remove grille
from outer cover
before
removing cover
from machine
Grille
Fixing screws (3)
Outer cover
Rremove panel
(4 screws)
Mains in
Condensate
drain
LPHW in
LPHW out
Port B
LPHW out
Port AB
LPHW in
Port A to LPHW fin
block
Fig 2
LPHW SCHEMATIC
Boiler
Radiator
(If fitted)
Flow
balance
valve
Flow meter
3 way motorised vslve
LPHW connections
located in cabinet
(Diverting)
Pump
Fig 3
DH75/110
Radaitor
(If fitted)
HEALTH & SAFETY WARNING
As the Heat Pump contains electrical and rotational equipment, it is recommended that ONLY competent persons carry out any work on this type of
machine (see guarantee). Isolate electrically before entering machine or removing panels.
This appliance is not intended for use by persons (including children) with reduced physical,sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance
ISOLATE ELECTRICALLY BEFORE ENTERING MACHINE OR REMOVING PANELS.
