9 of 20
4
3
0
F
C
60
80
100
0
20
40
F
C
60
80
100
0
20
40
G
PM
2
1
2
1
4
1
4
3
0
G
PM
SUPPLY
2
G
PM
2
1
2
1
4
1
1
2
1
4
1
4
3
0
RETURN
6. Supply and Return Line Sizing
The ProMelt panels can be connected to the snow melt
manifold using up to 50 feet (TOTAL of tubing including
both the supply and return lines) of the following;
Supply and Return Pipe Sizes:
150 MBH – requires a minimum of 1” tubing
(copper, Rad, RadiantPERT
or R-flex)
250 MBH – requires a minimum of 1-1/4” tubing
(copper, Rad or R-flex)
399 MBH – requires a minimum of 1-1/2” tubing
(copper, Rad or R-flex)
Installation
When installing the larger 399 MBH panels, it will be
necessary to install in sections. The panel system will
come fully assembled in the shipping crate. Expansion
tanks will be shipped loose in the crate.
First, disconnect the heat exchanger before attempting
to lift the assembly. Failure to do so may cause the pan-
els to warp, deforming the connecting copper.
Lift and mount the primary side followed by the second-
ary. Center both panels on the Cleat Bracket. Connect
the heat exchanger last. Ensure the heat exchanger is
level and the unions are securely tightened.
NOTICE
Step 1
Step 2
Step 3
If the manifold is located further that 25 feet away from
the panel (greater than 50 feet of tubing for the supply
and return lines combined), please contact Watts
technical services for assistance.
Insulation is required on the lines connecting the snow
melt manifold to the ProMelt panel.
