Delta MCS-1800 Service Manual Page 24

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© MHG Heating Ltd
24
MHG Heating Ltd Unit 4 Epsom Downs Metro Centre, Waterfield, Tadworth, Surrey KT20 5LR
Telephone 08456 448802 Fax 08456 448803 Email info@mhgheating.co.uk Web www.mhgheating.co.uk
020315 Draft
Wiring Diagram Legend
#
Description
Location
#
Description
Location
A0
Theta Cascade Controller
Control
S1
Module 1 Main Power Switch
Control
A1
Combustion Fan Control Voltage
Module
S2
Module 2 Main Power Switch
Control
A2
Not Used
NA
S3
Module 3 Main Power Switch
Control
A3
Flow and Return Sensors
Module
S4
Module 4 Main Power Switch
Control
A4
Control & Limit Thermostats
Module
SE
Outside Air Sensor (AF)
Control
A5
Module to Module Internal Communication
NA
SG
RCD Breaker
Control
A6
Gas Valve
Module
SPA1
Module Fan Damper Switch (Upper)
Module
A7
Ignition Transformer
Module
SPA2
Module Fan Damper Switch (Lower)
Module
A8
Pump (Upper Module Only)
Module
T3
Common Flow Sensor
Control
A9
Pump Differential Switch (Upper Module Only)
Module
T4
HWS Sensor / Volt Free Enable
Control
B1
Module Rectification Electrode (Upper)
Module
T5
Mixing Zone Flow Sensor
Control
B2
Module Rectification Electrode (Lower)
Module
T6
Mixing Zone Flow Sensor
Control
CB
HWS Charging Pump (Supplied By Others)
System
TAc1
Module Ignition Transformer (Upper)
Module
CBT1
Mixing Zone 1 Pump (Supplied By Others)
System
TAc2
Module Ignition Transformer (Lower)
Module
CBT2
Mixing Zone 2 Pump (Supplied By Others)
System
TF1
Module Flue Thermal Fuse (Upper)
Module
CI
Main Heating Circuit Pump (Supplied By Others)
System
TF2
Module Flue Thermal Fuse (Lower)
Module
CC1
Module 1 Pump
Module
TM1
Module Flow Sensor (Upper)
Module
CC2
Module 2 Pump
Module
TM2
Module Flow Sensor (Lower)
Module
CC3
Module 3 Pump
Module
TR1
Module Return Sensor (Upper)
Module
CC4
Module 4 Pump
Module
TR2
Module Return Sensor (Lower)
Module
EVG1
Gas Valve (Upper Module)
Module
TRS
Module Limit Thermostat
Module
EVG2
Gas Valve (Lower Module)
Module
TSF1
Module Flue Gas Thermostat
Module
F0
Main 16 Amp
Control
TSM1
Module Control Thermostat (Upper)
Module
F1
Module 1 10 Amp
Control
TSM2
Module Control Thermostat (Lower)
Module
F2
Module 2 10 Amp
Control
VM1
Mixing Zone 1 Valve (Supplied By Others)
System
F3
Module 3 10 Amp
Control
VM2
Mixing Zone 2 Valve (Supplied By Others)
System
F4
Module 4 10 Amp
Control
X1
Main Terminal Board
Control
H0
Remote Lockout Lamp
Control
X15.1
HWS, Common Flow Sensors Plug
Control
H2
Lockout Lamp
Control
X15.2
Mixing Zone Sensors Plug
Control
H22
Control Panel Light (Optional Extra)
Control
X16
Power Supply (2 Pin, 1 Amp Max)
Control
K3
Lockout Auxiliary Relay (System Limit Controls)
Control
X20
Module Power Supply Plug
Control
K11
Lockout Auxiliary Relay (System Temperature Control)
Control
X21
System Safety Group Plug
Control
KA1
Module 1 Pump Contactor
Module
X22..
E-Bus Cascade Communication Plugs
Control
KA2
Module 2 Pump Contactor
Module
X23
Main Heating Circuit Pump Plug
Control
KA3
Module 3 Pump Contactor
Module
X23.1
Mixing Zone 1 Pump Plug
Control
KA4
Module 4 Pump Contactor
Module
X23.2
Mixing Zone 2 Pump Plug
Control
MP1
Module Pump Differential Pressure Switch
Module
X24
HWS Charging Pump Plug
Control
MV1
Module Combustion Fan Motor (Upper)
Module
X26.1
Mixing Zone 1 Valve Plug
Control
MV2
Module Combustion Fan Motor (Low)
Module
X26.2
Mixing Zone 2 Valve Plug
Control
Pm
System Water Low Pressure Switch
Module
X30
RS485 Cascade Communication Plug
Control
PS
System Water High Pressure Switch
Module
X31
Outside Air Sensor Plug
Control
PS01
Condensate Level Limit Pressure Switch
Module
Y1
Cascade Communication Terminals
Module
R9
Anti-Sludge Sensor (Optional Extra)
Control
Z1
Filter
Control
S0
Theta Controller Main Power Switch
Control
BK
Black
BU
Blue
RD
Red
BN
Brown
WH
White
GR
Grey
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