Manual

11
MAMM-WSHP-IOM-1MA (November 2011)
Operating Limits
Application Limits
WATER TEMPERATURES / Degrees F *
Standard range Low Temp Geothermal
COOLING HEATING COOLING HEATING
MINIMUM ENTERING WATER TEMPERATURE
50˚ 50˚ 40˚ 25˚
MAXIMUM ENTERING WATER TEMPERATURE
110˚ 90˚ 110˚ 90˚
* Application limits apply at or above standard flow rates specified for size of unit.
Application Limits
AIRTEMPERATURES/DegreesF*
Standardrange LowTempGeothermal

COOLING HEATING COOLING HEATING
MINIMUMAMBIENTAIRTEMPERATURE**
50˚ 50˚ 50˚ 50˚
MAXIMUMAMBIENTAIRTEMPERATURE**
110˚ 110˚ 110˚ 110˚
MINIMUMENTERINGAIRTEMPERATURE
65˚ 50˚ 65˚ 40˚
MAXIMUMENTERINGAIR
TEMPERATURE
100˚ 80˚ 100˚ 80˚
*Applicationlimitsapplyatorabovestandardflowratesspecifiedforsizeofunit.
**Minimumandmaximumambientconditionsapplytoductedsupplyandreturnunitsonly.
Environment
Standard Range Units
Units are designed to start-up in an ambient
temperature of 50°F (10°C), with entering air at 50°F
(10°C), with entering water at 70°F (21°C), with both air
and water flow rates used in the ISO13256-1 rating
test, for initial start-up in winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for the
purpose of bringing the building space up to occupancy
temperature.
Geothermal Range Units
Geothermal heat pump units are designed to start-up in
an ambient temperature of 50°F (10°C), with entering
air at 40°F (5°C), with entering fluid at 25°F (-4°C), with
both air and water at flow rates used in the ISO 13256-
1 rating test, for initial start-up in winter.
Note: This is not a normal or continuous operating
condition. It is assumed that such a start-up is for the
purpose of bringing the building space up to occupancy
temperature.
Operating voltages
208-230/60/3. . . . . . . . . 197 volts min.; 253 volts max.
460/60/3 . . . . . . . . . . . . 342 volts min.; 418 volts max.
380-415/50/3. . . . . . . . . 342 volts min.; 418 volts max.
575/60/3 . . . . . . . . . . . . 342 volts min.; 418 volts max.
Additional Information For Initial Start-up Only
This equipment is designed for indoor installation only.
Sheltered locations such as attics, garages, etc., gen-
erally will not provide sufficient protection against ex-
tremes in temperature and/or humidity, and equipment
performance, reliability, and service life may be ad-
versely affected.
Note:
Voltages listed are to show voltage range. However,
units operating with over- or under-voltage conditions
for extended periods of time will experience premature
component failure. Three phase system imbalance
should not exceed 2%.