Lochinvar AQUAS APN400 Installation Instructions Manual

AQUAS POOL PACKAGE INSTALLATION INSTRUCTIONS
AQUAS Pool Package
The AQUAS pool package system is a high efficiency
commercial condensing boiler, pre-piped package system
from the factory to an indirect heat exchanger. This pool
heater is a low temperature operating system designed to
take advantage of the stainless steel heat exchanger and
condensing operating temperatures to ensure the highest
efficiency possible. The AQUAS is designed around a
predetermined flow set by the manufacturer between the
boiler and the indirect heat exchanger. The AQUAS operates
off the pool system pump itself which will continually supply
water to the indirect heat exchanger. This means there is no
need to purchase a dedicated circulator to deliver water to
this package system.
Installation Instructions
To achieve the optimum operating efficiency of your AQUAS
it is recommended that you keep the pool water flow of each
appliance within plus or minus five gallons per minute
of the recommended flow as stated in Table A. Low flow
through the indirect heat exchanger will result in elevated
temperatures supplied to the pool.
TABLE A
RECOMMENDED
MODEL SYSTEM
WATER FLOW
400 52 GPM
500 65 GPM
600 78 GPM
725 94 GPM
850 90 GPM
RECOMMENDED CLEARANCES:
BOILER - SEE FTXL I & O MANUAL
INDIRECT HEX - ALLOW 18" FOR SERVICE ON ALL SIDES
FOR MODELS: APN400 - 850
CONNECTION SIZE
2"
2"
2"
2"
2"
Piping
Pool / spa connections to the indirect heat exchanger are SCH 80
CPVC glue fittings. The connections from the field loop to the
heat exchanger may be done in CPVC or PVC pipe as follows:
• Use a cement that is rated for PVC/CPVC piping.
• To make the connection, apply glue to both the CPVC flange
and the section of pipe.
• Insert the pipe into the flange until it reaches the bottom of
the flange.
• Turn the pipe a half turn in the socket to ensure that a proper
seal is made.
Pool water is designed to flow from bottom to top standing in
front of the boiler. The field installed sensor is to be on the inlet
of the heat exchanger.
The supply and return water piping to the indirect heat exchanger
shall be no smaller than 2" for all models.
Throttling Valve
A T of 15°F - 20°F across the indirect heat exchanger is
recommended. Throttling valves are used to set the flow through
the indirect heat exchanger (standard gate valves are acceptable).
Figure 1 Component Location
AIR INLET
CONNECTION
GAS INLET
RELIEF
VALVE
T&P
GAUGE
FLOW
SWITCH
EXPANSION
TANK
DIR #2000546267 01
100326095_2000582397_Rev A
FLUE
CONNECTION
TITANIUM
HEAT EXCHANGER
SKID MOUNTED
ON FRAME