Enertech AV Series - Consumer Instructions; Electrical; Variable Speed

Enertech Global, LLC 14
AV : MD/ME - Rev. A Models
Installaon and Operaons Manual
Variable Speed
Overview
Enertech’s Variable speed Heat Pumps are designed to
match their capacity to the load of the zone. With a true
variable speed compressor and variable water ow, you now
maximize the benet from inverter driven technology. With
the installaon of a pressure dierenal bypass valve, even
a small radiant oor heang zone (three or four 1/2” PEX
circuits, 3 gpm of load ow) can allow a variable speed heat
pump to operate without the use of a buer tank. To maintain
the minimum ow rate required for the heat pump (minimum
5 gpm), part of the ow is returned to the heat pump
through the bypass valve, and the remainder is delivered to
the hydronic zone (minimum 3 gpm). This approach works
well for radiant oor zones. Very small loads will cause the
heat pump to cycle, but the minimum load ow rate for the
refrigerant circuit is always maintained. Systems that require
cooling must ulize fan coils that are large enough to allow
sucient run me to provide adequate latent capacity. Fan
coils smaller than one ton could cause the heat pump to cycle
too oen, not allowing the system to maintain a cold enough
coil to provide good dehumidicaon. Therefore, Enertech
recommends that fan coils, one ton (12,000 BTU’s) and larger
are used with variable speed heat pumps. Zones that are
smaller than 3 gpm are referred to as Micro-zones. Micro-
zones do not work with Variable speed heat pumps, the ow
rates are too low and cause the heat pump to short cycle.
Enertech’s Advantage System has almost limitless exibility,
we will be happy to provide a custom soluon for your
project! If your project falls outside of the provided guidelines
for water ow or BTU’s, please call our Design Services.

Buer tanks are not recommended with Variable speed
heat pumps. The purpose of a buer tank is primarily to
keep the heat pump running long enough to prevent short
cycling when the hydronic load is much smaller than the heat
pump capacity. Another important use of the buer tank is
to decouple the ow rate required for the heat pump from
the ow rate of the hydronic system, which is typically much
less than the heat pump requires. Heat pumps with single
speed and two-stage compressors almost always need more
ow rate than the design ow rate of the hydronic system
they serve, especially if only one zone is calling for heang or
cooling.
Secon 3: Introducon & Operaonal Consideraons

Dealer should instruct the consumer in proper operaon,
maintenance, lter replacements, thermostat and indicator
lights. Also provide the consumer with the manufacturer’s
Owner’s Manual for the equipment being installed.
Enertech Global D-I-Y Policy
Enertech Global’s heat pumps and system installaons may
include electrical, refrigerant and/or water connecons.
Federal, state and local codes and regulaons apply to various
aspects of the installaon. Improperly installed equipment
can lead to equipment failure and health/safety concerns.
For these reasons, only qualied technicians should install an
Enertech Global built geothermal system.
Because of the importance of proper installaon, Enertech
Global does not sell equipment direct to homeowners.
Internet websites and HVAC outlets may allow for purchases
directly by homeowners and do-it-yourselfers, but Enertech
Global oers no warranty on equipment that is purchased via
the internet or installed by persons without proper training.
Enertech Global has set forth this policy to ensure installaons
of Enertech Global geothermal systems are done safely and
properly. The use of well-trained, qualied technicians helps
ensure that your system provides many years of comfort and
savings.
⚠ WARNING ⚠
FAILURE TO FOLLOW THIS CAUTION MAY RESULT
IN PERSONAL INJURY. USE CARE AND WEAR
APPROPRIATE PROTECTIVE CLOTHING, SAFETY
GLASSES AND PROTECTIVE GLOVES WHEN SERVICING
UNIT AND HANDLING PARTS.
Electrical
Carry out the electrical installaon with care. Do not connect
the ground lead to gas lines, water lines, lightning conductors,
or telephone line ground leads. Incorrect grounding can cause
unit faults such as electrical shock due to short-circuing. Use
disconnect switches with sucient breaker capacity. Wiring
must be routed to prevent damage by metal edges or trapped
by panels.
Do not install the indoor or outdoor unit near locaons
where leakage of combusble gases can occur. Do not install
the unit where corrosive gas or combusble gas or liquids
can accumulate or be handled. The Indoor Module is not
waterproof and must be installed indoors.
Do not install and use the system close to equipment
that generates electromagnec elds or high frequency
harmonics. Equipment such as inverters, standby generators,
medical high frequency equipment and telecommunicaons
equipment can aect the unit and cause malfuncons and
breakdowns. The unit can also aect medical equipment
and telecommunicaons equipment, so that it funcons
incorrectly or not at all.
Insulate the unit’s connecon pipes so that the ambient air
moisture does not condense on them. Insucient insulaon
can cause condensaon, which can lead to moisture damage
on the roof, oor, furniture, and valuable personal property.