IS-PM824 Effective Date: 0915-1
EDP# 81012455
© Watts, 2009
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.
Slab
Maximum 100A Heating Load
120/208/240VAC
2 circuits
Pole-mount sense
PM-224
or PM-824
Junction
Box
Circuit Breaker Panel
Junction
Box
Contactor Control 2C
Ground
120 / 208 / 240 VAC
Ground
120 / 208 / 240 VAC
Maximum 70A breakers
Ground
L1
L2
T1
T2
Ground
L1
L2
T1
T2
Ground
C1
C2
S1 S2 Y2
Ground
Gr
Ground
Y2
Yel
S2
Br
Bl
Yel
S1
Use size 18- to 24-gauge 4-conductor
wire, outdoor rated (telephone wire).
L1
L2 / N
L1
L2 / N
Slab
Maximum 100A Heating Load
277VAC
2 circuits
Pole-mount sense
PM-224
or PM-824
Junction
Box
Circuit Breaker Panel
Junction
Box
Contactor Control 2C
Ground
277 VAC
Ground
277 VAC
Maximum 70A breakers
Ground
L1
L2
T1
T2
Ground
L1
L2
T1
T2
Ground
C1
C2
S1 S2 Y2
Ground
Gr
Ground
Y2
Yel
S2
Br
Bl
Yel
S1
Use size 18- to 24-gauge 4-conductor
wire, outdoor rated (telephone wire).
Ground
120 VAC
Ground
120V
PRI
L1
L2 / N
L1
L2 / N
Delay Adjust
Temp Adjust
Sensitivity Adjust
Probe Jack
Grid Jack
Switch Jack
Control/Monitor Jack
LED Jack
Configuration Switch
Load
Input Power
Recommended Switch Settings
Function
Trigger
LD Off
LD on
LTC
DEL
RAIN
SNOW
Snow sensor
w/o LTC
TT>AT
2 min
2 min
OFF
OFF
OFF
ON
Snow sensor
w/LTC
TT>AT>15°F
2 min
2 min
ON
OFF
OFF
ON
Snow controller
w/o LTC
TT>AT
30-90 min
2-6 hr
OFF
ON
OFF
ON
Snow controller
w/LTC
TT>AT>15°F
30-90 min
2-6 hr
ON
ON
OFF
ON
Do Not set the Rain switch to "ON". Possible overheating of the
snowmelt cables may result.
Supply Voltage
22 - 28 VAC
Trigger Temperature Range (TT)
34°F to 44°F
Configuration Modes
Snow Only
Rain Only
Snow or Rain
Delay Settings (post melting)
30 to 90 minutes
2 to 6 hours
Low Temperature Cutoff (LTC)
Prevents system operation
when Ambient Temperature
(AT) is below 15°F
Operation Modes
Automatic
Standby/Reset
Manual
