Watts ProMelt Contactor Pro CP-50 Instructions For Installing

Instructions for Installing ProMelt
Contactor Pro Relay Panels
For ProMelt CP-50, CP-100, and CP-200 Panels
The CP-50, CP-100, and CP-200 are turn-key panels for activating a
ProMelt snow melting system when used in conjunction with the ProMelt
series of controls. They allow simple connection from the circuit breaker
panel and have a manual override timer and heating indicator. Any CP
series panel can be used as an "extension" panel that connects to another
CP series panel and allows additional circuits to be controlled.

Installation

General

These panels must be installed in accordance with local building
codes, the National Electrical Code, or Canadian Electrical Code by
qualified persons.
Disconnect power from all circuits prior to making
any connections.
Do not energize circuits until all connections are made and all
ProMelt mats/cables are fully installed and covered as required.
Read and follow the installation instructions for both the ProMelt
snow melt mat/cable and the ProMelt sensor for additional information.
Mount the panel indoors on a wall or equivalent. Do not place in a con-
fined air space where heat is not able to escape, such as a small closet.
Properly secure the panel to the wall using the mounting holes provided.
Wire the panel according to the provided schematics.
A GFEP (Ground Fault Equipment Protection) type circuit breaker
must be used to protect each ProMelt circuit. Size circuits for 125%
of the load.
This panel must be bonded to ground, as well as all conduit, junction
boxes and other associated items per local code.

Wiring CP series panels

1. Provide 120, 208, 240, or 277 VAC circuits to the panel contactor(s)
L1 and L2 terminals as required by the rating of the ProMelt snow
melting mats/cables connected to this circuit. As shown in the wiring
schematics, the panel draws internal power from Contactor C1
terminals, so make sure power is supplied to this contactor.
2. For 120, 208, and 240 VAC systems, the COM lead from the transformer
comes prewired to contactor C1 terminal L1. Connect the transformer
lead wire matching the contactor voltage supplied to C1 terminal L2.
Please see transformer color chart, below right.
CAUTION:
Incorrect voltage supplied to the transformer
!
may cause damage, fire, or shock.
3. For 277 VAC systems, a separate 120 VAC circuit will need to be
supplied to the transformer 120 VAC and COM lead wires directly. This
may be a standard 15 A or 20 A circuit.
4. Use outdoor rated 4-conductor cable to make connections between
this panel and the sensor selected. See the wiring schematic and
instructions provided with the sensor for proper connections. Connect
Control Descriptions
Control
Contactor Pro CP-50
Contactor Pro CP-100
Contactor Pro CP-200
No. Contactors Max. Amp Load
1 50
2 100
4 200
The ProMelt Contactor Pro Relay Panel is available in three configurations.
CP-50 (single contactor), CP-100 (dual contactors), and CP-200 (quad con-
tactors).
the PM series sensor to the terminal block terminals 24VAC, COMMON,
and PM and also to the grounding bar. This will be a Class 2, 24 VAC
circuit. See "Terminal Block Wire Insertion Detail" on reverse.
5. Make wire connection between the contactor T1 and T2 terminals and
the ProMelt mats/cables.
Wiring CP series panels to be "Extension Panels".
A CP series panel can be used in conjunction with another CP series
panel to serve as an "extension panel". Follow the steps below for
proper installation:
1. Provide 120, 208, 240, or 277 VAC circuits to the panel contactor(s)
L1 and L2 terminals as required by the rating of the ProMelt snow
melting mats/cables connected to this circuit.
2. For 120, 208, and 240 VAC systems, the COM lead from the transformer
comes prewired to contactor C1 terminals L1. Connect the transformer
lead wire matching the contactor voltage supplied to C1 terminal L2.
Please see transformer color chart below.
3. Use a 2-conductor cable to make connections between terminals
24VAC and PM in the "extension" panel and terminals X1 and X2 in the
"main" CP series panel.. This will be a Class 2, 24 VAC circuit.
4. Make wire connection between the contactor T1 and T2 terminals and
the ProMelt mats/cables.
Note: Do not connect a sensor to the "extension" panel. The sensor
connected to the "main" panel will operate both panels.
Transformer Colors
Primary Voltage
120 Volts
208 Volts
240 Volts
* 277 Volts
*
See "Wiring CP series panels" Section, Step 3 for 277VAC connections.
IS-WR-PM-Contactor-Pro-Panels
Lead Colors
Black & White
Black & Red
Black & Orange
No Transformer Connections