BULLDOG HEAT PUMP Vertical Stacked – Installation Manual
5
© Copyright 2017 CGC Group of Companies, Inc. Installation Manual is Subject to Change without Notice - Last Revised Aug 15, 2017
RISER BUNDLE INSTALLATION
1.
The supply and return risers are standard type “M”
copper. Type “L” copper is optional. The condensate
riser is type “M” copper.
2.
Risers are factory swaged expanded top end to accept
risers from the unit above and to minimize field brazing.
The factory will also pre-install service isolation ball
valves on the supply and return risers.
3.
The risers are pre-bundled with a metal channel for slip
fit connection to the left or right side of the cabinet as
indicated on the construction drawings. The copper
risers need to be isolated from the metal channel and
cabinet with neoprene isolation to prevent metal-to-
metal contact with housing.
4.
Match unit location with riser bundle nomenclature as
indicated by the manufacturer supplied riser schedule,
and the label affixed to the riser bundle.
5.
Refer to Figure 7 (page 6) for positioning of risers
pertaining to floor-to-floor installment. The riser
diameter shall be as shown on plans. Riser length and
schedule shall be coordinated with the mechanical
contractor.
6.
Hang the riser bundle slip fit connection onto the
riser knockout on the cabinet. See Figure 5.
7.
Align and insert riser into swage top end of the
risers below. Do not scrape or dent the risers
during positioning. The risers bottom ends
should slide approximately 2” of the 3” swage
top ends. This will allow for the floor to floor
variations and prevent the riser joints from
bottoming out.
8.
Expansion allowance is not needed as the difference
between the summer to winter temperature change is
minimal.
9.
Braze riser joints with Sil-Fos or 95/5 tin-antimony
solder. Perform a system leak test.
10.
A fire stop may be required for the riser openings in
the floors. Consult local fire codes for dictation on
appropriate requirements.
11.
Refer to the consulting engineers instructions
for riser anchoring requirements.
Figure 5
Figure 6
Riser knockout
Condensate Riser
Supply/Return Risers
Swaged ends
