Johnson Controls Frick AcuAir - Condensate Drain Trap Sizing; Drain Pan Construction; Field Piping Requirements

210.100-IOM (JUL 2021)
Page 28
AcuAir Hygienic Air Units
Installation
Condensate drain trap sizing
All condensate drain connections and oor drains must be
trapped at the job site location. Failure to correctly trap
a drain results in ooding of the drain pan and potential
water damage to the air-handling unit and other building
facilities.
To design the drain traps, see Figure 31 and the total
static pressure (TSP) associated with the main fan and
motor as indicated on the applicable AcuAir
®
data drawing.
For AcuAir
®
drain and system piping information and sug-
gestions, refer to AcuAir
®
white paper, 210.200-WP6.
Drain pan construction
AcuAir
®
recessed hygienic drain pans are triple sloping and
have a minimum depth of 3 in. at the drain connection.
Drain pans and pipe stub outlet connection are construct-
ed of 304 stainless steel unless specied otherwise.
Figure 31: Condensate drain trap sizing
Figure 32: Drain pan detail
SLOPE
RECESSED HYGIENIC OUTLET
SLOPE
MPT
SLOPE
AIRFLOW
ACUAIR UNIT
HOUSING
REFRIGERANT
CONNECTION
STUB DRAIN
DRAIN PAN
HAT CHANNEL
COIL SUPPORT
COIL SUPPORTS
Field piping requirements
1. General – Every effort must be made in eld piping to
keep the stresses to a minimum on the coil connec-
tions.
a. Allow for thermal expansion and contraction of all
eld piping.
b. Do not rely on the coil connections to support the
weight of the eld piping.
c. Design piping to minimize transmittal of vibration
through the piping to the unit coils.
2. Steam piping – When a steam coil is supplied, the
steam piping must be installed in accordance with state
and local codes and accepted industry practices. Refer
to the supplied piping diagram for specic information.
Before shipment, steam coils are pressure tested at 150
PSI, with a maximum operating pressure of 50 PSI.
3. Refrigerant piping – When a cooling coil is supplied,
all refrigeration piping must be installed in accordance