McQuay MHC Standard Range User Manual

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8. Units are internally trapped. Copper or PVC
condensate lines can be used. A means of
disconnection must be furnished to facilitate chassis
removal.
9. No point of the drain system may be above the drain
pan of any unit.
10.Automaticowcontroldevicesmustnotbeinstalled
 priortosystemcleaningandushing.
11. A high point of the piping system must be vented.
12. Check local code for any requirement for electric
ttings.
Water Connections
All piping connections should be made using good
plumbing practices and in accordance with any and all
local codes that may apply.
Note: On left-hand piping units the water supply
connection is on the top. Right hand piping units the
water supply is at the bottom location.
Unit Piping Connection
Each heat pump is supplied with extended copper
tubingonthewater-to-refrigerantcoiland5/8"(16mm)
O.D. tubing. The connections are for both the supply
and return water connections. See Figure 5 for left and
right hand connections locatons.
Shutoff/Balancing Valve Piping
Each heat pump requires a shutoff valve on both the
supply and return lines for easy serviceability and
removal if it becomes necessary.
We suggest using our combination shutoff/balancing
valvesinstalledintheeldbetweenthecontractor’s
piping and the heat pump unit. The valve installed on
the return line acts as a balancing valve to adjust the
properwaterow.Anautomaticowlimitingdeviceis
also available as a factory installed option.
Eachshutoff/balancingvalvehas1/2"FPTand1/2"
FPT threaded connections.
Attachtheeldinstalledcombinationshut/offbalancing
valve to the building water supply and return piping.
Add the female pipe adapter connection to unit supply
and return coil connection by sweating them in place
using silver solder.
Usingthespeciedhoses,screwthexedend
intotheshut-off/balancingvalve.Removethe1/2"
adapter from the other end of the hose. Insert the
adapterintothefemaletting.Usingtwocrescent
wrenches, one to hold the pipe connection and the
second to tighten the adapter, insert the swivel end of
the hose on the adapter and tighten. This completes the
hose connection to standard heat pump equipment.
Figure 5. Supply and Return Connections Locations for Left- Hand and Right Hand Units (Flat Top and Slope Top)
Right-Hand Piping View
Left-Hand Piping View
On left-hand piping units the
water supply connection is on
the top. Right-hand piping units
the water supply is at the bottom
location.
IMPORTANT
Unit Size J K L M P Q R S
007-018
6⅞"
5
1
/
5
" 6¾" 3½" 10¼" 1
3
/
5
" 5¼" 7½"
(175mm) (132mm) (172mm) (90mm) (260mm) (41mm) (134mm) (192mm)
Dimensions (High Sill Units)

McQuay MHC Standard Range Specifications

General

Brand	McQuay
Model	MHC Standard Range
Category	Heat Pump
Language	English