Dantherm Calorex DH334BH Technical document

DH334BH
Technical installation manual (261001 issue 11)

2 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL

HEALTH AND SAFETY WARNING
As e dehumidifier embodies electrical and rotational equipment, ONLY competent persons
should carry out any work on is type of machine.
(SEE GUARANTEE)
Contents
HEATH AND SAFETY WARNING ..............................................................................4
1.0 PRINCIPLES ..........................................................................................................5
2.0 EXAMPLES & SKETCH OF PRINCIPAL EQUIPMENT ......................................6
3.0 PERFORMANCE GRAPH.....................................................................................8
4.0 DATA SHEET .........................................................................................................9
5.0 INSTALLATION ...................................................................................................10
5.1 INSTALLATION DRAWING DH334BH..............................................................10
5.2 INSTALLATION DRAWING CONTROL MODULE............................................11
5.3 INSTALLATION: SITING, PLUMBING & ELECTRICAL....................................12
5·3.1 SITING. .............................................................................................................12
5.3.2 DEHUMIDIFICATION AIR FLOW ...................................................................12
5.3.3 DEHUMIDIFIER PLUMBING...........................................................................13
5.4 ELECTRICAL (MACHINE WIRING AND SUPPLY)...........................................14
5.4.1 ELECTRICAL SCHEMATICS...........................................................................15
6.0 SETTING UP/COMMISSIONING.......................................................................22
7.0 INDICATOR LIGHTS............................................................................................26
8.0 WARRANTY CONDITIONS................................................................................30
9.0 WIRING DIAGRAMS...........................................................................................31
10.0 DEHUMIDIFIER REFRIGERATION SCHEMATIC ...........................................45
11.0 SPARE PARTS LIST..........................................................................................46
12.0 SUPPORT STRUT KIT INSTALLATION INSTRUCTIONS..............................63
13.0 REMOTE SEQUENCE END MONITOR INSTALLATION INSTRUCTIONS ...64
14.0 REMOTE FAULT MONITOR INSTALLATION INSTRUCTIONS .....................65
15.0 OPTIONAL AIR ON FILTERS...........................................................................66
3
261001 ISSUE 11

HEALTH AND SAFETY WARNING
This appliance can be used by children from eight years and above and persons wi reduced
physical, sensory or mental capabilities or lack of experience and knowledge if ey have been
given supervision or instruction concerning e use of e appliance in a safe way and understand
e hazards involved. Children should not play wi e appliance. Cleaning and maintenance shall
not be made by children wiout supervision.
This machine is classified as “NOT ACCESSIBLE TO THE PUBLIC” and erefore should be located
in a machine room and serviced by qualified personnel.
Disconnect from e mains supply and wait ree minutes before removing panels and
commencing work on is machine.
HEATH AND SAFETY WARNING
4 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL

1.0 PRINCIPLES
THE HEAT PUMP DEHUMIDIFIER FOR PROCESS DRYING.
1.1 METHOD OF OPERATION
The dehumidifier is an AIR to AIR heat pump which functions in a similar
manner to e domestic refrigerator. It comprises a vapour recompression
refrigeration circuit wi a refrigerant fluid, operating on e reversed Rankine
cycle. Its major components erefore are a cold heat exchanger (evaporator),
comressor, hot heat exchanger (condenser), expansion devise and a fan to
provide air movement. In common wi all heat pumps, e heat is absorbed at
e evaporator and rejected at e condenser, wi e compressor increasing
e pressure of e refrigerant fluid, and erefore e temperature at which e
heat is rejected.
1.2 EFFICIENCY
The quantity of heat delivered at e condenser, ‘Qh’ will comprise e heat
absorbed at e evaporator plus e ermal equivalent of e energy input ‘W’
which is required to bring about e compression, less any small losses at
may occur. The eciency of e heat pump, its coecient of performance, can
en be expressed and written: C.O.P = Qh/W
1.3 In a heat pump dehumidifier, e source for e heat absorbed at e
evaporator is e humid air drawn into e dehumidifier from e product
being dried. As is air passes rough e evaporator it is rapidly chilled to a
temperature below its dew point, so resulting in condensate (water) being
drained from e process. The heat recovered, approximately 2300Kj for every
kg (litre) of water condensed, is rejected at e condensor at a much higher
temperature an e air incident on e ‘hot’ coil. Air is erefore returned
to e drying process at a higher temperature an when it entered e
dehumidifier. However in e process of collecting more moisture from e air
surrounding e product e temperature is lowered back to its level prior to
being chilled out. This process is continuous roughout e drying process.
Should additional heating be required at any stage of drying an auxillary heater
bank is usually fitted wiin e dehumidifier but can be fitted at any point in
e ‘circuit’.
1.4 In e dehumidification process, water is removed from e chamber
wiout e need for ventilation, e system is totally recirculatory leading to
a ermal eciency approaching 100%. By removing water in its liquid raer
an vapour state, only a small amount of sensible heat is discharged, and no
latent heat is lost.
1.5 It is usual to determine e eciency of a heat pump from its C.O.P.
as described in is section, however wi a Process Dehumidifier, a more
useful measure is e quantity of water discharged per unit of electricity
consumed, and expressed as kg/kWhr. When desiging a drying system using
dehumidifiers, water extraction per time at any given air condition is necessary
to enable e dehumidifier requirement to be matched to e system moisture
removal rate. The Process Dryer DH334BH has been designed specifically
to remove optimum quantities of water at air conditions of between 25ºC
and 55ºC in temperature, togeer wi Humidities of between 10% and
60%. It will of course work extremely well at higher humidities but its design
parameters make it most effective in e ‘band’ shown. Oer dehumidifiers
can be designed for optimum performance in diferent ‘bands’. Bearing in mind
at e latent heat of vapourisation of water 2300kJ/kg is 1.56kg/kWhr (100%
ecent) en e DH334BH dehumidifier has e ability to remove water from
a process at specific moisture extracton rates well above at necessary for
100% eciency of operation.
1.6 SYSTEM EFFICIENCIES
The figure of most importance to an energy manager when considering drying
eciencies is e TOTAL energy input per unit water output. The total system
eciency is lower an at of e dehumidifier alone in at oer components
wiin e drying system also require energy. During e drying process, in
addition to electrical energy to drive e compressor, it is also needed to:
a) Pre-heat e product and chamber structure .
b) Produce e primary airflow
c) Replace conduction and air leakage losses .
However residual heat from e ancillary equipment is absorbed wiin e
drying chamber instead of simply being lost to atomsphere, so adding to e
general eciency of e dehumidifier system of drying.
5
261001 ISSUE 11

2.0 EXAMPLES & SKETCH OF PRINCIPAL EQUIPMENT
PROCESS DRYING DEHUMIDIFIER APPLICATIONS
It is fact at e specific moisure extraction rate of a heat pump dehumidifier
decreases as e relative humidity level of e incident air decreases. The
dehumidifier is erefore more ecient when applied to processes which have
high average relative humidities as starting points for at extraction, typically
50%
Ideal areas of application for ese units are ose where temperatures up to
55ºC will encourage enough moisure to ‘migrate’ from e product to be dried,
so at relatively high humidities can be achieved. However as a result of design
and improved technology over e last 15 years, modern Process Dryers can
now remove considerable quantities of moisture at temperature and humidity
levels unheard of even a few years ago. Improved meods of control of e
conditons wiin a drying chamber have furer enhanced e dehumidfier
as a tool for removing water from processes more economical an ever. The
dehumidifier is now used in ose industries at have become ENERGY
CONSCIOUS and QUALITY CONSCIOUS and a wide variety of companies are
successfully adapting e technology to eir needs, including:
CONFECTIONERY
CERAMICS
REFRACTORY MATERIALS
TEXTILES
TIMBER
LEATHER
and of course for e environmental control in warehousing.
2.1 EXAMPLES
Ceramics Gypsum Mould Drying
Ceramic tableware is oen produced by pouring a liquid clay ‘slip’ onto or into
an already prepared gypsum mould. Excess slip is removed from e mould by
a simple pouring action or by centrifuge, and water from e remaining clay is
absorbed by e mould. Aer a short ‘standing’ period e clay becomes firm
enough for it to be seperated from e mould. Bo e mould and e ware
now require to be dried even ough e mould can be used several times.
Moulds also have a limited lifespan and need to be continually replaced by new
moulds which have to be dried, having been manufactured from gypsum and
water. Typically moulds are dried from 30% to less an 2% moisture content
at temperatures restricted to less an 52ºC, in at unacceptable ‘burning’ of
e mould takes place at higher temperatures, which reduces dramatically eir
lifespan. Using e DH334BH dehumidifier, times to dry ese new moulds
have been reduced from ‘days’ where heat and vent systems were employed
using variable ambient conditions of temperature and humidity, to ‘hours’. The
same product is dried for e same leng of time and for e same cost, every
time, and more importantly wi e same vastly improved quality, so leading to
much longer lifespan of mould. A recent customer has reduced his drying time
from ‘usually 3½ to 4 days’ down to an overnight drying time of 16 hours. This
has led to less moulds being required and a more reliable end product being
produced much faster an before. The energy cost is constant and has been
reduced by as much as 60%.
Ware Drying
Tableware has a need to be dried aer ‘sponging’ and before ‘firing’ to ensure
at a quality product is e end result. The recent use of dehumidifiers in drying
at is stage has been recognised by many cost conscious factory types and it
has become very successful by nature of its ‘even’ drying pattern and constant
quality of product.
Timber
One of e most successful applications in drying has been of expensive
quality hardwoods. Most of ese timbers are dried at temperatures at do not
exceed 55ºC and e need to remove moisture carefully and relatively slowly to
avoid e many problems caused by overfast drying is paramount in obtaining
e quality necessary to retain eir value. The DH334BH process dryer is ideal
in at its control of conditions wiin e ‘kiln’ are reliable and very accurate
allowing moisture only to be removed from e timber at e correct rate.
Timber drying was an early application for dehumidifiers, and has remained one
of e most successful applications roughout e years.
Confectionery
The drying of Wine Gums and many oer ‘gelatine starch’ based products has
for many years been a long winded and dicult process wi bottlenecks at
e drying stage. The end product is poured as a liquid into a pre-formed mould
made from corn starch. It has to en be dried so as to produce a product at
is ‘comfortable’ to eat, has a long ‘shelf life’ and is easy to handle at e packing
stage.
6 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL

To obtain e best result was dicult when drying was done using Heat and
Vent meods in at depending on outside and factory conditions, drying
could take anying from 24 hours to 4 days wi a furer cooling period of
sometimes two days. The introduction of e dehumidifier and e ‘closed
batch’ drying system resulted in energy costs being reduced by as much as
83%. The temperature to dry was lowered to 50ºC and water was extracted
at humidities of 30% which according to e tasters, gave a better product.
Times to dry were reduced to around 20 hours wi 3 hours cooling, and
handling problems disappeared overnight. The introduction of e DH334BH
wi its ability to take moisure from e product in large quantities at lower
humidities has enhanced e drying performance in is area wi even lower
temperatures now being used. Confectionery drying has become a very
successful application for good dehumidifiers wi correct accurate control of all
stages of e process.
2.6 Oer Applications
The drying of high quality skins in e leaer industry has shown a very
high saving in energy cost of some 73% wi a marked improvement in e
quality of e skin, coupled to e fact at no sperm oil was en necessary to
condition e skin as is e case wi conventional drying.
Textiles and latex rubber are oer areas where dehumidifiers have shown
eir total flexibility and ability to produce a high quality produce at a very
economical cost on a regular turn around time. Most products at rely on e
addition of water in a prior process can be dried very successfully by CALOREX
dehumidifiers.
CONTROL
SKETCH SHOWING PRINCIPAL EQUIPMENT
FRONT VIEW (DOORS NOT SHOWN)
DOOR
CONTROL PANEL
AIR
OUTLET
DEHUMIDIFIER
DH334BH
PANEL
FANS
PRODUCT
DEHUMIDIFIER
DH334BH AIR INLET
GRILLE
DEHUMIDIFIER
DH334BH
OVERHEAT PROTECTION VENT
PRODUCT
FALSE CEILING
AIR FLOW
SKETCH SHOWING PRINCIPAL EQUIPMENT
7
261001 ISSUE 11

AIR RH
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
50%
55%
60%
65%
70%
75%
80%
85%
90%
0
5
10
15
20
Litres/hr
30 deg C
40 deg C
50 deg C
60 deg C
DH334BH
DeFrost Zone
OverHeat
Zone
OverLoad
Zone
70 deg C
25 deg C
2
3
4
5
6
7
Input kW
(Wiout 9 kW Heater)
30 deg C
40 deg C
50 deg C
60 deg C
50 deg C
0
5
10
15
20
25
30
Heat Output kW
(Wiout 9kW Heater)
30 deg C
40 deg C
60 deg C
3.0 PERFORMANCE GRAPH
8 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL

4.0 DATA SHEET
4.1 CONTROL/POWER MODULE
CONTROL MODULE
POWER (400V ~3N 50Hz)
Min Supply Capacity/Max FLA Amps 58
Recommended Fuse Size Amps 63
Max Number of Dehumidifiers per Module Quantity 2
Remote Condensing Units per Module Quantity 2
Max Number of Air Heaters (Fitted to Dehum) Quantity 1
Max Output Per Air Heater kW 9
DEHUMIDIFIER (400V ~3N 50Hz)
Temperature Range C 10 - 65 °C
Relative Humidity Range % 15 - 80
Dehumidification Rate l/hr 13.4
Output to Air Nett kW 10
Nominal Air Flow m³/Hour 5800
Max Allowable External Static Pressure Pa 0
Total Electrical Input kW 14.1
Min Supply Capacity/Max FLA Amps 29
Compressor L.R.A. Amps 75
Compressor R.L.A Amps 12.5
Air Heater Max power output kW 9
Air Heater FLA Amps 12
HERMETIC SYSTEM
Refrigerant Charge R134a kg 6.0
Sound Level at 3m dbA 69
Duty @ Air on = 50ºC, RH = 50%
Physical Data
Wid mm 985
Dep mm 700
Height mm 1436
Weight kg 170
Remote Condensing Unit Information
Remote Condensing Unit FLA Amps 3.8
Note
Module to be installed in conditions of < 50ºC < 100% non condensing.
R134a Global warming potential (GWP) 1430
9
261001 ISSUE 11

5.1 INSTALLATION DRAWING DH334BH
580 700
REAR VIEW
1436
86
280 425
985
MAINS IN
L/HAND SIDE
20 370
1490 PACKED
561
50
700
DIA 32
DH334BH - MASTER/SLAVE UNIT WEIGHT UNPACKED = 170Kg WEIGHT PACKED = 172Kg AIR INLET FILTER KIT AVAILABLE FROM YOUR DISTRIBUTOR
AIR OUT
TOP VIEW
1024 PACKED
752 PACKED
SERVICE
PANEL
480
116
DRAIN 3/4 DOMESTIC
WASTE SIZE
654 784
AIR INLET
FRONT
SERVICE
PANEL
MAINS
LAMP
100 730
5.0 INSTALLATION
10 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL

5.2 INSTALLATION DRAWING CONTROL MODULE
35.00
35.00 530.00 530.00
1320.00
PACKED
8 MOUNTING HOLES DIA 8,5
730.00
940.00
PACKED
1200.00
200.00
340.00
PACKED
1000.00
800.00
OUTLINE DIMENSIONS CONTROL/POWER MODULE
11
261001 ISSUE 11

5.3 INSTALLATION: SITING, PLUMBING & ELECTRICAL.
Great care should be exercised in following e installation procedure to ensure
at your Calorex dehumidifier performs as it was designed.
5·3.1 SITING.
a. Ensure dehumidifier on site is as ordered, i.e. model, electrical supply and
factory fitted option.
b. Inspect unit for damage, in particular inspect e evaporator (finned side)
to ensure at it is undamaged. (Minor indentations in e fins do not affect
performance). If severely damaged, endorse delivery note in presence of e
driver and send a recorded delivery letter to transport company giving details.
c. Protect unit if installation is delayed.
d. Provide a firm level base capable of supporting operational weight of unit;
spread load if on timber floor.
e. Ensure water cannot collect under unit, recommend units are installed on
plins 100mm above finished floor level and to also aid condensate drainage.
f. Allow adequate clearance to service panels on unit; recommend 500mm
minimum (see installation drawings).
g. All Calorex dehumidifiers are by design as quiet as is practicable, however,
due consideration should be given to siting in order to fully exploit is feature,
i.e. orientate inlet/outlet parallel to occupied premises.
h. Ensure loose debris will not block air inlet filters or grilles.
5.3.2 DEHUMIDIFICATION AIR FLOW
Due consideration must be given to air flow, ie. do not obstruct inlet or outlet
ducts and ensure discharge air cannot re-circulate to inlet (see below)
Grille or Apertures MUST comply wi e following minimum free area:
Inlet 0.56 m²
Discharge 0.2 m²
Required Free Area to provide air flow to and from heat pump when installed
in an enclosed area or where required to pass air rough a wall, etc.
Note: if multiple units are installed in an enclosed area en e inlet free areas
required for each unit can be added togeer to form one inlet aperture BUT
discharge from each unit must be kept separate and not be incorporated into
one common duct system.
INCORRECT CORRECT
INSTALLATION WITH LOW CEILING
*
*
NOT RECOMMENDED DUE TO
POOR SERVICE ACCESS GRILLES OR APERTURES MUST
COMPLY WITH MINIMUM FREE AREA
*
ALSO SERVICE ACCESS REQD FROM THIS SIDE
SEE MACHINE CABINET DIMENSION DRAWING.
TYPICAL OUTSIDE OF CHAMBER INSTALLATION
12 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL

5.3.3 DEHUMIDIFIER PLUMBING
The condensate drain at e base of e unit discharges e condensation from
e evaporator fins.
It is erefore necessary to ensure at e dehumidifier is placed on a level
plin so at e condensate water can run away and not overflow e edges
of e driptray inside e machine.
AIR INLET
FRONT
SERVICE
PANEL
DEHUMIDIFIER CONDENSATE PLUMBING
DO NOT RUN DRAIN ACROSS
FRONT SERVICE PANEL
3/4" DOMESTIC
WASTE SYSTEM
'U' TRAP
FALL TO DRAIN
WASTE OUTLET
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261001 ISSUE 11

5.4 ELECTRICAL (MACHINE WIRING AND SUPPLY)
All electrical work is to be carried out in accordance wi I.E.E. standards, latest
issue, or local codes of practice as applicable.
The machine should be installed in accordance wi EMC2004/108/EC.
Protected supply to incorporate fuses or motor rated circuit breakers (Type C)
to specified rating, (see Data Sheet). H.R.C. fuses are recommended. An isolator
which disconnects all poles must be fitted wiin 2m and in sight of e control
panel.†
All units must be correctly eared/grounded. An ear leakage trip of e
current operating type is recommended to be fitted to all electrics.
IMPORTANT:- Inconsistent Electrical Supply.
The following Iimits of operation list not be exceeded if Calorex machines are to
be guaranteed eier in performance or warranty terms:
Three-phase machines (nominal 400V); Voltage limits = 360V/440V min/max.
Cycle (nominal 50Hz); Frequency limits = 47·5Hz/52·5Hz min/max.
N.B. This voltage must be available at e Dehumidifier whilst it is running under
full load.
The voltage must not drop below e above figures when starting e machine.
† Note e isolator must have a minimum of 3mm air gap when turned off.
Correct cable sizing
The cable supplying electricity to a machine wi a given load must increase
in cross sectional area (C.S.A) as e leng increases in order at e
voltagemdrop wiin e cable does not exceed recommended limits. Cable
sizing should be calculated by an approved electrician wi due consideration to
I.E.E and local codes of practice.
THE DH334 INCORPORATES A ROTARY COMPRESSOR WHICH
REQUIRES A PHASE PROTECTION DEVICE.
THE CONTROL PANEL MUST HAVE PHASE ROTATION PROTECTION
FITTED.
14 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL

5.4.1 ELECTRICAL SCHEMATICS
RELATIONSHIP OF COMPONENTS ON TYPICAL INSTALLATION
3 PHASE SUPPLY
400V 50Hz
63 AMP CAPACITY
WITH NEUTRAL & EARTH
CALOREX
CONTROL MODULE
CALOREX
DEHUMIDIFIER
(MASTER)
INTEGRAL FAN
INTEGRAL COMPRESSOR
INTEGRAL AIR HEATER
INTEGRAL CONDITION PROBES
CALOREX
DEHUMIDIFIER
(SLAVE)
INTEGRAL FAN
INTEGRAL COMPRESSOR
INTEGRAL AIR HEATER
HUMIDIFIER No 1
HUMIDIFIER No 2
CALOREX
POWER MODULE
RECIRCULATION FAN No 1
RECIRCULATION FAN No 2
RECIRCULATION FAN No 3
RECIRCULATION FAN No 4
RECIRCULATION FAN No 5
RECIRCULATION FAN No 6
RECIRCULATION FAN No 7
RECIRCULATION FAN No 8
EXHAUST FAN No 1
EXHAUST FAN No 2
15
261001 ISSUE 11

5.4.1 ELECTRICAL SCHEMATIC CONT’
ELECTRICAL LINKING CABLE/CONDUIT REQUIREMENTS
L1
L2
L3
N
CALOREX
CONTROL
PANEL
FEEDS TO EACH RECIRCULATION/
EXHAUST FAN.
L1, L2,L3 N, + EARTH
63 AMP FUSED SWITCHED SUPPLY
3 PHASE 400V 50Hz NEUTRAL & EARTH
MACHINES MUST BE EARTHED TO THE CONTROL PANEL WITH A MINIMUM OF 6mm² CABLE.
THE DH334 INCORPORATES A ROTARY COMPRESSOR WHICH REQUIRES A
PHASE PROTECTION DEVICE.
THE CONTROL PANEL MUST HAVE PHASE ROTATION PROTECTION FITTED.
GREEN/YELLOW
RED
PINK
BLUE
RED
WHITE
BLUE
RED
PINK
BLUE
BLUE
BLUE
BROWN
BLACK/ORANGE
RED
RED/BLUE
GREY/BLUE
GREY
ORANGE
BLACK/WHITE
BLACK/ORANGE
COMPRESSOR
AIR HEATER
FAN
CONTROL LINKS ALL
1mm PVC
COVERED WIRES
SCREENED 2 CORE RS376-224.
SCREENED 1 CORE RS367-218.
MASTER MACHINES ONLY
CALOREX DEHUMIDIFIER MASTER UNIT
L1, L2, L3, N + EARTH
HUMIDIFIER
CABLES FOR
COMPRESSOR,
HEATERS AND
FAN TO BE
2.5mm PVC
COVERED WIRES
(MINIMUM
SPECIFICATION)
GREEN/RED
16 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL

FEED TO CONTROL /POWER MODULE
3 PHASE SUPPLY
CALOREX
CONTROL MODULE
CALOREX
POWER MODULE
ISOLATOR
AS SEEN WITH LID OPENED
1
L1
2
L2
3
L3
T1 T2 T3
1 2 3
N
N
3 PHASE SUPPLY IN
CALOREX
DH334BH
1 2 3 4
L1 L2 L3
1/4 TURN FASTENERS
DEHUMIDIFIER
TERMINAL BLOCK
CONDUIT OR
TRUNKING
ENTRY POINT
C8
C17
L1 L2 L3 L1 L2 L3
TO
DEHUMIDIFIER
MASTER
TO
DEHUMIDIFIER
SLAVE
(IF FITTED)
DEHUMIDIFIER
CALOREX POWER MODULE
PANEL
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261001 ISSUE 11

C9
C18
L1 L2 L3 L1 L2 L3
TO
DEHUMIDIFIER
MASTER
CALOREX POWER MODULE
CALOREX
DH334BH
7 8 9 10
L1 L2 L3
1/4 TURN FASTENERS
DEHUMIDIFIER
TERMINAL BLOCK
CONDUIT OR
TRUNKING
ENTRY POINT
DEHUMIDIFIER
TO
DEHUMIDIFIER
SLAVE (IF FITTED)
PANEL
CALOREX
DH334BH
4 5 6 7
L1 L2 L3
1/4 TURN FASTENERS
DEHUMIDIFIER
TERMINAL BLOCK
CONDUIT OR
TRUNKING
ENTRY POINT
C1
C10
L1 L2 L3 L1 L2 L3
TO
DEHUMIDIFIER
MASTER
TO
DEHUMIDIFIER
SLAVE
(IF FITTED)
DEHUMIDIFIER
CALOREX POWER MODULE
PANEL
LINK FROM POWER MODULE TO DEHUMIDIFIER FAN
LINK FROM POWER MODULE TO DEHUMIDIFIER INTEGRAL AIR HEATER
18 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL

LINK FROM POWER MODULE TO DEHUMIDIFIER CONTROL CIRCUIT
1/4 TURN FASTENERS
DH334BH
DEHUMIDIFIER
TERMINAL BLOCK
CONDUIT OR
TRUNKING
ENTRY POINT
DEHUMIDIFIER
10 11 12 13 14 15 16 17 18 19 20
TO DH334BH
10 11 12 13 14 15 16 17 18 19 20
PANEL
CONTROL/ POWER MODULE
2
TERMINAL NUMBERS 6 TO 39
10-20
CALOREX
DH334BH
1/4 TURN FASTENERS
DEHUMIDIFIER
TERMINAL BLOCK
CONDUIT OR
TRUNKING
ENTRY POINT
DEHUMIDIFIER
CALOREX POWER MODULE
39 40 41 42 43
TO DEHUMIDIFIER MASTER
21 22 23 24 25
SCREEN RED BLUE
25 24 21 23 22
SCREEN BLUE RED
SCREENED
CABLES
GRND +10V VS
PANEL
LINK FROM POWER MODULE TO MASTER DEHUMIDIFIER PROCESS CONDITION SENSORS
19
261001 ISSUE 11

LINK FROM POWER MODULE TO HUMIDIFIER
LINK FROM POWER MODULE TO EXHAUST FANS
C2
C11
L1 L2 L3 L1 L2 L3
TO
HUMIDIFIER 1.
TO
HUMIDIFIER 2.
CALOREX
POWER MODULE
(IF FITTED)
L1
L2
L3
L1
L2
L3
HUMIDIFIER 2.
HUMIDIFIER 1.
(IF FITTED)
C7
C16
L1 L2 L3 L1 L2 L3
TO
EXHAUST FAN 1.
TO
EXHAUST FAN 2.
CALOREX
POWER MODULE
(IF FITTED)
L1
L2
L3
L1
L2
L3
EXHAUST FAN 2.
EXHAUST FAN 1.
(IF FITTED)
20 261001 ISSUE 11
DH334BH & STAGE CONTROL MODULES TECHNICAL MANUAL MANUAL