Copyright 2016 Mestek, Inc.
SCM2-0118
W30-WG0593
IN UNITED STATES: 260 NORTH ELM ST. WESTFIELD, MA 01085 800-465-8558 / FAX (413) 564-5815
IN CANADA: 7555 TRANMERE DRIVE, MISSISSAUGA, ONTARIO, L5S 1L4 (905) 670-5888 / FAX (905) 670-5782
SECTION 1: READ BEFORE PROCEEDING
Model SCM overview .................................................................. 2
SECTION 2: SCM FIELD ADJUSTABLE PARAMETERS
SECTION 3: SPECIFICATIONS AND RATINGS
SECTION 4: DIMENSIONS
SECTION 5: LOCATION & MOUNTING
Prepare the unit .......................................................................... 11
Location ...................................................................................... 11
Handling ...................................................................................... 11
Mounting pad .............................................................................. 11
SECTION 6: RECOMMENDED PIPING DIAGRAM
SECTION 7: GLYCOL/WATER SYSTEM
Glycol/water system design ................................................. 13
Glycol/water system installation .................................................. 14
SECTION 8: START-UP AND TEST
BEFORE starting the unit ............................................................ 15
Start the SpacePak heat pump .................................................... 15
Anti-freeze cycle ......................................................................... 16
24-Hour follow-up ........................................................................ 16
Electric heat ................................................................................. 16
SECTION 9: ELECTRICAL CONNECTIONS
Overcurrent protection & wire sizing ........................................... 17
SpacePak heat pump wiring ............................................. 17
Multiple air handler applications .......................................... ........ 18
SECTION 10: TROUBLESHOOTING
SECTION 11: ANNUAL MAINTENANCE
Glycol/water mixture ................................................................... 23
Perform annual inspection .......................................................... 23
Preparing the SCM for shut down ............................................... 23
To restart after shutdown ............................................................ 23
SECTION 12: REPLACEMENT PARTS
SECTION 13: LIMITED WARRANTY
MODEL SCM
INSTALLATION,
OPERATION
& MAINTENANCE
MANUAL
Air-To-Water
Reverse Cycle Heat Pumps
3 and 5 Ton
For information not included in this
manual, see the following: This manual
includes only basic information for instal-
lation, operation and maintenance of
SpacePak air to water heat pumps. For
more advanced applications and informa-
tion not shown in this manual, contact
SpacePak Technical Support for assis-
tance and supplemental instructions. Call
413-564-5530 in Westeld, MA or visit our
website at www.spacepak.com to send an
e-mail or review technical literature.
Qualied installer only —
This product must be installed
only by a qualied service techni-
cian. The installation must be
done using recognized industry
practices, and in compliance with
this manual and all applicable
codes. Failure to comply could
result in death, serious injury or
substantial property damage.
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