321 Studios QW5S, QW2S User Manual

BARD MANUFACTURING COMPANY, INC.

Engineering Specification Guide

1.0 GENERAL

Furnish and install a self-contained, vertical, floor standing, heat pump to
be manufactured by Bard Manufacturing Company, Inc. The unit shall be
approved and Listed by Intertek ETL Listed (ETL US/C). Unit shall be
factory assembled, pre-charged, pre-wired, tested and ready to operate.
Unit performance shall be AHRI Certified in accordance with ISO Standard
13256-1:1998 “Water to Air and Brine to Air Heat Pumps”, which includes
watt allowance for water pumping. Unit shall include 5 year parts warranty
covering compressor, parts, and heat exchange coils, subject to terms and
conditions of Bard Limited Warranty Agreement.
Unit efficiency shall be specified in terms of EER and COP.

Manufacturers: Capacities shall be as indicated on drawings and units
shall be manufactured by Bard Manufacturing Company, Inc. or prior
approved equal.

2.0 CONSTRUCTION FEATURES

2.1 CABINET

Constructed of 20 gauge pre-painted or vinyl laminated galvanized
steel. Choices available are either two-tone (vinyl) finish with “slate ”
front panels and “platinum” cabinet for des igner appearance, (gray)
or (beige) painted steel (select one). Vinyl finish is very resistant to
scratching and marring and is easy to clean. Tamper resistant
fasteners are provided for access panels. Unit includes built-in
rollers for each installation into wall sleeve and removal for service,
if necessary. Front panel is hinged and lockable for filter service and
access to primary functional electrical controls.

2.2 INSULATION

Cabinet is fully insulated with foil covered, high-density fiberglass
insulation with sealed edge treatment and special sound deadening
insulation material in the compressor section. All insulation is
designed to resist mold and mildew growth and facilitate ease of
cleaning.

QW2S-QW5S Water-to-Air H/P

F1915 (2012 04) Page 1 of 6

2.3 COMPRESSOR

All models shall use a high efficiency scroll compressor with step
capacity providing 2 stages of control. The compressor shall be
covered by a 5-year parts warranty. The refrigeration circuit shall be
equipped with factory installed high and low-pressure controls. The
refrigeration control shall be a factory installed TXV. Compressor
shall be mounted on isolation rails wi th double grommets. Unit shall
be provided with R-410A (HFC) non-ozone depleting r efrigerant. Unit
shall be provided with liquid line filter/drier.

Current sensing relay shall be used to detect high amps caused by
high ambient and/or low voltage and to s hift compressor to 1st-stage
operation until conditions corrected

2.4 COAXIAL WATER COIL

All models shall have either cupronickel or copper (SELECT ONE);
water coil, fully insulated, with double o-ring connections. Copper
coils should not be used on open wells.

2.6 INDOOR BLOWER MOTOR

The indoor blower motor shall be a variable speed (ECM) type to
produce the same rated airflow from 0 to .8 inch WC of external static
pressure (.5 on Q24W model) at low sound levels. The motor is to be
self-adjusting to provide proper rated airflow at high s tatic pressures
without user adjustment or wiring c hanges by the user. The motor
shall be programmed for 20-second ramp up and 60-second down
rate for quiet, smooth starting and stopping. ECM motor shall
include preprogrammed speeds for ventilation mode, first stage
operation, second stage operation, ducted operation, and non­ducted operation.

2.7 ELECTRICAL COMPONENTS

Electrical components are easily accessible for routine inspection
and maintenance through front service panels. Circuit breaker is
standard on all 208/230-volt models and rotary disconnect standard
on all 460-volt models. Circuit breaker/rotary disconnect access is
through lockable access panel. Lock and key are provided as
standard equipment. Unit shall have single point entry for line
voltage.

2.8 CONTRO L CIRCUIT

The internal control circuit shall consist of a cur rent limiting 24VAC
type 65VA transformer with circuit breaker. To prevent rapid
compressor short cycling, a five-minute time delay circuit shall be
factory installed. Two low-pressure controls shall be included as

F1915 (2012 04) Page 2 of 6