Marstair 929 Series User manual

1
TECHNICAL MANUAL
FOR CD3 (929 SERIES) CHILLED WATER CLOSE CONTROL UNITS
This manual covers installation and technical aspects of TEV Ltd. CD3 range (929 series) of close control units.
INDEX
GENERAL Introduction 2
General description and part numbers
- CW upflow/downflow configurable 2
CD3 Configurable options 2
Dimensions and weights 4
SELECTION Performance data CW 4
Airflows 4
Sound levels 5
INSTALLATION Airflow options 5
Unit mounting - Upflow 6
- Downflow 7
Pipe sizes 7
Electrical connections 8
APPLICATION Electrical data 8
Fuses 9
Condensate drain 9
WIRING DIAGRAMS Power diagram 10
Controls diagram 11
OPERATION and Fan speed controller 12
COMMISSIONING Condensate pump (optional) 12
Humidifier 12
pCONet Parameters 15
Microprocessor controller 19
COMPONENT Exploded views of units with 28
IDENTIFICATION component identification
TEV Ltd.
Armytage Road, Brighouse,
West Yorkshire. HD6 1QF.
Tel: [phone]
Fax: [phone]
e-mail: [e-mail] 92908133-09

2
INTRODUCTION
The standard air handler units in the CD3 Chilled Water range are available as Configured units in upflow and downflow
versions. All units are electronically controlled.
Options can provide the close control of temperature and humidity demanded by computer rooms, laboratories, banks,
offices etc..
CD3-RANGE - GENERAL DESCRIPTION
CW UPFLOW/DOWNFLOW CONFIGURABLE* -- electronic (microprocessor) controls
CUSTOMER CONFIGURABLE
MODEL
8
10
15
20
UPFLOW
92917001
92917002
92917003
92917004
DOWNFLOW
92917005
92917006
92917007
92917008
CHILLED WATER ELECTRONIC CONFIGURABLE UNIT FEATURES:
* 4 capacity sizes in 3 cabinets * Upflow and downflow systems available
* Class 'O' thermal and acoustic insulation * Electronic (microprocessor) controls
* Washable filters * Electronically controlled fan speeds
* Discharge plenum (Upflow only) * Switches: Off/standby, unit run
* Display giving access to set points and alarms * Alarms: humidity/temperature out of limits
Each unit is controlled using a programmable microprocessor controller, providing the versatility of control
needed to meet the demand of the market place; from
CD3 CONFIGURABLE ACCESSORIES
DESCRIPTION
MODEL
Field Fit Kit
Part Number
Factory Fitted Option
Part Number
CONTROLS
Electronic Humidity Only Control (and bottle change indication)
ALL
92900405
Hum and Dehum Control (and bottle change indication)
ALL
92900418
Dehum Control (No Humidifier)
ALL
92900416
pCONET BMS BACnet Control
ALL
92919134
92919133
USB to RS485 Connector
ALL
92919136
ALARMS
1 High water level
ALL
92900412
2 Water spillage
ALL
92900411
3 Fan failure
ALL
92900408
Dirty filter indication
ALL
92900409
Dirty filter indication - volt free relay
ALL
92900621
Hum bottle change indication - volt free relay
ALL
92900622
CHILLED WATER VALVES
2 way motorised
008, 010, 015
92911028
92900428
20
92911029
92900429
3 way motorised
008, 010, 015
92911030
92900430
20
92911031
92900431
Modulating 3 port valve
008, 010, 015
92911092
92900492
20
92911093
92900493
ELECTRIC HEATERS - SINGLE STAGE
For 2 stage heaters add kits together , e.g.: 8kW + 6kW = 14kW
Max. heater loads: 008 = 8kW, 010 = 10kW,
015 = 16kW, 020 = 20kW
2 kW
92900451
4 kW
92900452
6 kW
92900453
8 kW
92900454
10kW
92900455
HEATER RAIL
(must be used with electric heaters on all units)
008U
92919021
010U, 015U
92919022
020U
92919023
008D
92900464
010D, 015D
92900465
020D
92900466

3
DESCRIPTION
MODEL
Field Fit Kit
Part Number
Factory Fitted
Option
Part Number
LPHW COIL 7.52kW
10.50kW
14.94kW
18.40kW
008 U/D
92900423
010 U/D
92900424
015 U/D
92900424
020 U/D
92900425
LPHW VALVE 2 WAY
(motorised) 3 WAY
ALL
92900426
ALL
92900427
HUMIDIFIER 0-4kg/h
(For hum and dehum controls see next page)
008U
92900444
010U, 015U
92900445
020U
92900446
008D
92900447
010D, 015D
92900448
020D
92900449
CONDENSATE PUMP (alarm interface fitted)
ALL
92900402
FRESH AIR SPIGOT 100mm dia
ALL
92900462
FRESH AIR SPIGOT 160mm dia
ALL
92900463
FRESH AIR FAN AND FILTER93m3/h
ALL
92900403
FRESH AIR FAN AND FILTER 186m3/h
ALL
92900404
TOP DUCTED DISCHARGE SPIGOT
(when used as return air spigot on downflow units a plenum is
required for access to disposable filters).
8
92900459
010, 015
92900460
20
92900461
SOUND ATTENUATION SECTION
008 U
92900475
010U, 015U
92900476
020U
92900477
FLOOR STAND PLINTH
75mm high
(Recommended for use with all floor standing units and for side entry
of services)
008U
92900432
010U, 015U
92900433
020U
92900434
008D
92900435
010D, 015D
92900436
020D
92900437
DOWNFLOW PLINTH Front discharge
008D
92900481
300mm high Front discharge
010D, 015D
92900482
Front discharge
020D
92900483
Rear discharge
008D
92900484
Rear discharge
010D, 015D
92900485
Rear discharge
020D
92900486
DOUBLE DEFLECTION GRILLE
(Upflow only)
008U
92900494
010U, 015U
92900495
020U
92900496
DISPOSABLE FILTER 50mm
(Replaces washable filter)
008U
92900438
010U, 015U
92900439
020U
92900440
008D
92900441
010D, 015D
92900442
020D
92900443
HIGH EFFICIENCY FILTERS 100mm
(Includes additional plenum section)
008U/D
92900478
010U/D, 015U/D
92900479
020U/D
92900480
ISOLATOR 63A
008U/D
92900456
010U/D, 015U/D
92900457
020U/D
92900458
U = UPFLOW D = DOWNFLOW

4
CD3 UNITS DIMENSIONS AND WEIGHTS (no plenums fitted)
UNPACKED
PACKED
Model
CD3
CD3
8
10
15
20
8
10
15
20
HEIGHT mm
1165
1165
1165
1165
1300
1300
1300
1300
WIDTH mm
1230
1380
1380
1580
1250
1400
1400
1600
DEPTH mm
430
430
430
430
455
455
455
455
WEIGHT kg
124
142
151
160
141
160
169
184
PRODUCT SELECTION
CHILLED WATER PERFORMANCE DATA
MODEL
008
010
015
020
AIRFLOW (max) m3/s
0.78
1.04
1.23
1.51
NOMINAL COOLING CAPACITIES CHILLED WATER 5C - 10.5C
22C 50% RH
TOTAL
8.75
12.40
16.81
22.06
SENS
8.33
11.34
14.84
18.87
24C 50% RH
TOTAL
12.19
16.48
22.11
28.25
SENS
9.77
13.03
17.05
21.43
26C 50% RH
TOTAL
15.57
20.57
27.45
34.62
SENS
11.07
14.60
19.09
23.85
NOMINAL COOLING CAPACITIES CHILLED WATER 6C - 11C
22C 50% RH
TOTAL
8.19
11.49
15.59
20.37
SENS
8.09
10.95
14.31
18.12
24C 50% RH
TOTAL
11.56
15.51
20.82
26.48
SENS
9.50
12.62
16.49
20.66
26C 50% RH
TOTAL
14.88
19.54
26.07
32.84
SENS
10.78
14.16
18.50
23.08
NOMINAL COOLING CAPACITIES CHILLED WATER 7C - 12.5C
22C 50% RH
TOTAL
6.80
9.50
12.49
16.17
SENS
6.80
9.50
12.49
16.17
24C 50% RH
TOTAL
9.01
12.62
17.13
22.36
SENS
8.45
11.42
14.94
18.90
26C 50% RH
TOTAL
12.54
16.83
22.60
28.75
SENS
9.83
13.05
17.06
21.36
NOMINAL COOLING CAPACITIES CHILLED WATER 9C –14.5C
22C 50% RH
TOTAL
5.07
7.48
9.86
13.03
SENS
5.07
7.48
9.86
13.03
24C 50% RH
TOTAL
6.95
9.61
12.64
16.28
SENS
6.95
9.61
12.64
16.28
26C 50% RH
TOTAL
9.24
12.81
17.42
22.63
SENS
8.55
11.48
15.00
18.91
AIRFLOWS (m³/s)
CD3
008
010
015
020
Min
Max
Min
Max
Min
Max
Min
Max
0.42
0.78
0.67
1.04
0.72
1.23
0.92
1.51
Maximum external resistance = 150 Pa at Maximum air volume

5
SOUND PRESSURE LEVELS -- CD3 UNITS
UPFLOW
FAN SPEED
8
10
15
20
Top Discharge and
Front Return
High
NC
59
60
58
61
dBA
66.5
67
65
68
Front Discharge
with Plenum and
Front Return
High
NC
49
49
48
50
dBA
58.5
58.5
57
58
Front Discharge
and Front Return
High
NC
60
58
58
60
dBA
67
65
65
65
DOWNFLOW
FAN SPEED
Standard
High
NC
44
45
45
48
dBA
53
54
54
56
CD3 AIRFLOW OPTIONS

6
CD3 SERIES CLOSE CONTROL UNIT INSTALLATION
An envelope containing important user information is supplied with the indoor unit. Please pass this to the end user.
1The standard unit is supplied configured for the correct airflow as ordered by the customer.
2The central panel, with control panel inset, MUST be removed first using the two keys provided.
UNIT ACCESS AND CABINET STRIP DOWN
1If a door interlock isolator is fitted, ensure that the switch is turned to the OFF position.
2Using the keys provided, unlock the electrics access panel. Remove the panel by easing outwards and down.
3The side panels can be removed by releasing the two swell latches located through the side bulkheads within
the electrics compartment and carefully pulling outwards until they are clear of the upper and lower grabber
catches.
4Access to the fan section, (and coil section in the downflow mode), can be gained by releasing the appropriate
swell latches located through the cut outs to the front of the side bulkheads and removing the panel.
5The return air grille can be removed by turning the 4 retaining screws anticlockwise until a click is heard and
pulling the grille outwards.
MOUNTING
1It is recommended that ALL field fit kits be installed prior to mounting the unit and brazing the pipe work.
2Ensure that the wall or floor will accept the operating weight of the unit ;the weights shown below include the
plenum.
Model
8
10
15
20
Weight (kg)
144
165
165
187
NOTE:-When wall mounting, the unit should be lifted into position using the pallet provided.
3Mark off the mounting holes as shown and drill holes to suit M6 Rawlbolt shields or equivalent fasteners.
UPFLOW SERVICE AND FIXING HOLE CENTRES (excluding discharge plenum)
N
Note: Plenum not shown is 430mm high
UNIT SIZE
DIMENSION 'A'
DIMENSION 'B'
008
1230
-
010 / 015
1380
690
020
1580
790
COIL SECTION

7
DOWNFLOW SERVICE AND FIXING HOLE CENTRES
UNIT
DIMENSION 'A'
DIMENSION 'B'
008
1230
--
010/015
1380
690
020
1580
790
4If a fresh air facility is required, apertures must be prepared as shown above/opposite. This must be suitably lined
and screened on the internal wall to prevent brick dust entering the unit.
5Mount the unit and secure the fixings.
6Check that the unit is square and level, (failure to do so will result in misalignment of the cabinet panels).
PIPE CONNECTIONS
CD
3
CW inlet & outlet (mm)
LPHW inlet & outlet (mm)
Condensate connection (mm)
008
22
15
15
010
22
15
15
015
28
15
15
020
28
15
15

8
ELECTRICAL CONNECTIONS
The installation wiring should be carried out in accordance with I.E.E. regulations and/or local codes.
A mains isolator should be used and the system suitably fused, (see page 24).
Supply cables and connecting cables are provided by the installer.
INDOOR UNIT WIRING
Connections for internal wiring are made within the electrics enclosure accessed by removing thecentre front cover. When
removing the cover disconnect the connecting cable from the display panel before moving the cover away from the unit.
Mains cables should be connected via a fused switch and routed through knockouts in the bottom left hand corner of the
unit, then through an access hole in the bottom left hand side of the electrics compartment to the mains terminal block.
The earth wire is connected toan earth stud at the right hand side of the mains terminal block. All mains and interconnecting
cable must be sized to suit the electrical rating of the unit and the length of cable run.
Make sure that all connections are secure and all wires are clear of any rotating parts.
ELECTRICAL DATA
1 Ph 230V 50Hz
3 Ph 400V 50Hz
CD3
Full Load Amps
Full Load Amps
Cooling Only
Cooling Only
Cool & Heat
Cool/Heat/Hum/Dehum
Amps
A/PH
A/PH
A/PH
008
5.4
5.4
16.7
32.7
010
7.4
7.4
17.7
32.7
015
9
9
26.0
41.0
020
9.4
9.4
33.3
49.3
The 3 ph unit loads are based on maximum heating capacities, in 2 stages, which are:-
CD3 08 = 8kW (2x4) CD3 10 = 10kW (6+4) CD3 15 = 16kW (2x8) CD3 20 = 20kW (2x10)

9
CURRENT RATINGS
CD3 HEATING (1 PHASE)
TOTAL
HEATING
LOAD
CURRENT
RATING
(Amps)
UNIT SIZE
8
10
15
20
1 STAGE
2 STAGE
1 STAGE
2 STAGE
1 STAGE
2 STAGE
1 STAGE
2 STAGE
2kW
8.3
O
O
O
O
4kW
16.7
O
O (2+2)
O
O (2+2)
O
O (2+2)
O
O (2+2)
6kW
25
O
O (4+2)
O
O (4+2)
O
O (4+2)
O
O (4+2)
8kW
33.3
O
O (4+4)
O
O (4+4)
O
O (4+4)
O
O (4+4)
CD3 HEATING (3 PHASE)
1 STAGE
2 STAGE
TOTAL
HEATING
LOAD
CURRENT
RATING
AMPS/PHASE
UNIT SIZE
TOTAL
HEATING
LOAD
CURRENT RATING
AMPS/PHASE
UNIT SIZE
L1
L2
L3
8
10
15
20
L1
L2
L3
8
10
15
20
2kW
-
-
8.3
O
O
O
O
-
-
-
-
-
-
-
-
4kW
-
8.3
8.3
O
O
O
O
4kW (2+2)
8.3
-
8.3
O
O
O
O
6kW
8.3
8.3
8.3
O
O
O
O
6kW (4+2)
8.3
8.3
8.3
O
O
O
O
8kW
8.3
8.3
16.
7
O
O
O
O
8kW (4+4)
8.3
8.3
16.7
O
O
O
O
10kW
16.
7
8.3
16.
7
-
O
O
O
10kW (6+4)
16.7
8.3
16.7
-
O
O
O
O= HEATING OPTIONS
Note: If non-standard 2 stage heating
arrangements have been fitted to order, check the
wiring diagram provided with the unit before
calculating current ratings.
12kW (6+6)
16.7
16.7
16.7
-
-
O
O
14kW (8+6)
16.7
16.7
25.0
-
-
O
O
16kW (8+8)
25.0
16.7
25.0
-
-
O
O
18kW (10+8)
25.0
25.0
25.0
-
-
-
O
20kW (10+10)
25.0
25.0
33.3
-
-
-
O
CD3 FANS
UNIT SIZE
8
10
15
20
RUNNING CURRENT
4.4A
6.4A
8.0A
8.4A
NUMBER OF FANS
1
2
2
2
POWER RATING
550W
370W
330W
550W
CONTROL CIRCUIT
2A
HUMIDIFIER
16A
FUSES
The system and its supply/interconnecting wiring must be protected by fuses, preferably H.R.C. motor rated types to
EN60269 or miniature circuit breakers to EN60898 or local codes having similar time lag characteristics that allow
starting of the compressor yet still afford close over-current protection under running conditions. The ratings below are
for H.R.C. motor rated or semi-enclosed wire fuses.
Air Handler
CW 08
CW 10
CW 15
CW 20
1 Phase
10
16
16
16
3 Phase
10
16
16
16
Fuse ratings are for cool only units. For other variants use the electrical tables to calculate fuse sizes.
CONDENSATE DRAIN
The condensate drain connection is at the left hand end of the condensate drain tray.
A 15mm O.D. copper drain stub is provided in the drain sump for connection with non-kink plastic tubing secured with
a suitable clip.
Should it be necessary for the drain tube to go through the back or base of the unit, use the knockouts provided.
The drain line must have a constant fall to open drain using a 'U' trap if required. Check that the water will run freely
and that there are no leaks.
IMPORTANT: If a humidifier is fitted the drain tube must be capable of carrying water at 60°C.
WHEN INSTALLATION HAS BEEN COMPLETED - CHECK:-
1All pipe work and joints for leakage.
2All pipe work and fittings for insulation.
3All bolts are secure and that fan rotates freely.

10
POWER WIRING DIAGRAM