IS-WR-PM-Contactor-Pro-Panels
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 No. Contactors Max. Amp Load
Contactor Pro CP-50 1 50
Contactor Pro CP-100 2 100
Contactor Pro CP-200 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 contactors).
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 Lead Colors
120 Volts Black & White
208 Volts Black & Red
240 Volts Black & Orange
277 Volts No Transformer Connections
*
See "Wiring CP series panels" Section, Step 3 for 277VAC connections.
*
Operation
X1
X2
Once all wiring connections have been completed, the sensor and ProMelt
mats/cables have been fully installed, and any inspections made as
required per local code, energize the circuit breaker(s) supplying the panel.
Automatic Operation
This is the recommended mode of operation. The sensor will activate
the panel, energize the connected ProMelt mats/cables indicated by the
"Heating On" light on the front of the panel.
PM
PM
24VAC
24VAC
OMMON
OMMON
Terminal Block Wire Insertion Detail
Manual Operation
This mode may be used to briefly test the system or temporarily
override the sensor control to complete melting or drying of a snow
melted area. If this is required often to help complete the snow melting
of an area, it is recommended to adjust the sensor control or consult your
system designers for possible improved automatic sensing and control.
Turn the Timer to the desired time. This overrides the sensor and
activates the panel, energizing the connected ProMelt mats/cables,
shown by the "Heating On" light.
Do not manually energize the ProMelt mats/cables with outdoor
temperatures above 68°F (20ºC) except for a brief test up to 10
minutes in duration. Damage to the mats/cables or slab/surface
materials may result.
Circuit
Breaker
Panel
240
208
120
COM
CP
Contactor
Panel
Junction
Box
Transformer Notes:
Connect primary to quick-connect
terminals L1 and L2 on contactor C1.
CAUTION: Ensure voltage lead
matches supply voltage to C1.
Improper connection may cause
damage.
X1 & X2 are dry contact, N.O.
120 / 208 / 240 VAC
Branch circuit protection provided by
installer. Maximum 70A GFEP type.
N / L1
L1 L2
C1
ProMelt
L2
T2T1
L2
N / L1
24VAC
L1 L2
T2T1
C4
GRN
PM-224
or PM-824
Sensor
PM-HSC5
Sensor
BLU
RED BLK ORGBLU
277 VAC
120 VAC
Control
Circuit
Circuit
Breaker
N L N L N L
Panel
240
208
CP
X1
X2
PM
Common
Contactor
Panel
120
COM
Same connections as 120 / 208 / 240 VAC
CP Contactor Panel used as an
BRN YELYEL
Installation Notes:
CABLE TO SENSOR
Class 2 control circuit.
Use 4-conductor shielded, outdoor
rated wire.
See sensor manual for minimum wire
gauge and maximum wire lengths.
Branch circuit protection provided by
installer. Maximum 70A GFEP type.
L1 L2
C1
L1 L2
T2T1
T2T1
C4
(Optional)
"extension" panel
X1
X2
PM
24VAC
Common
WIRING
Wire per NEC or CEC and local codes.
Circuit size 125% of load.
Field wiring: Use Copper Conductors
Only, 75C, 20 lb-in (2.3 Nm)
PM
24VAC
Common
To optional
additional
CP-Series
panels
X1
X2
rev 071712 Watts Radiant (800) 276-2419
CP series of controls can be used directly with any ProMelt cable or mat system. Power is connected directly to each contactor in the control.
Each ProMelt system can be used with a wide variety of moisture/precipitation sensors, including the following:
– Slab Mounted: PM-HSC5
– Pole Mounted: PM-224 and PM-824
Each sensor option is designed to operate a single system. Use a dedicated sensor and CP Control group for each snow melt zone.
CP-50, CP-100, CP-200 Specifications
Terminals Wiring Type
L1, L2
T1, T2
120, 208, 240, 277 VAC
PM Class 2,
24VAC, COMMON 24 VAC
X1, X2 Dry Contact, N.O.
PM-224
Compatible Sensors
PM-824
PM-HSC5
File 3176880,
ETL Listing
UL 508A,
CAN/CSA-C22.2 No. 14
Indoor, NEMA 1
Environment
enclosure, operating
temperature 0ºF to 100ºF
(-18ºC to 38ºC)
12 AWG
(Minimum)
18-24 AWG
(See sensor
instructions
for size and
length limits)
!
WARNING: General Safety Instructions
1. THIS UNIT SHOULD BE INSTALLED ONLY BY
QUALIFIED PERSONNEL!
2. Disconnect all power from the control before
opening the front cover plate.
Transformer Colors
Primary Voltage Lead Colors
120 Volts Black & White
208 Volts Black & Red
240 Volts Black & Orange
Each CP series relay panel comes pre-wired to the
included transformer, terminal blocks, and the coil
terminals on the provided contactors. It is not
recommended to unwire, or tamper with existing
wiring without pre-authorization from the factory.
Limited Warranty: Watts Radiant (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In
the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES,
EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting from labor charges, delays,
vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control. This warranty shall be invalidated
by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above limitations may not
apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine your rights. SO FAR AS IS
CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.
A Watts Water Technologies Company
IS-WR-PM-Contactor-Pro-Panels 1 233 © 2012 Watts Radiant
EDP# 81012456
USA: 4500 East Progress Place, Springfield, MO 65803; www.wattsradiant.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.watts.ca
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