User Guide

AMX SERIES DIRECTCONNECT™
62-3097—02 2
Fig. 2. Water Heater with Recirculation
Recirculation Loop
The purpose of a recirculation loop is to supply immediate
tempered water to all hot water fixtures. This helps conserve
water usage. In the recirculating loop, the hot water supply
returns from the furthest fixture from the heating source and is
connected to the AMX mixing valve recirculation port and the
cold supply line of the water heater, storage tank or boiler. The
AMX Series DirectConnect mixing valve allows easy
recirculation connection through the integral recirculation port.
A temperature control circulating pump is required to move
the tempered water in the recirculation loop. The Honeywell
L6006C1018 Aquastat
®
Control is the recommended
temperature control device for the circulator. The Honeywell
Aquastat Controller should be set 5° to 10° F (-15° to -12° C)
below the set mixed outlet temperature.
CAUTION
Injury Hazard.
Exceeding mix temperature can cause burns.
For domestic water applications the AMX Series
DirectConnect Mixing Valve temperature should not
exceed 120° F (49° C).
Fig. 3. Water Heater used for Domestic Water
and Space Heating.
Legend:
1 = Check Valve.
2 = Alternate pump location.
V = Any device which turns the domestic water system into a
closed system, such as backflow preventers, check valves or
pressure reducing valves.
T = Recirculation pump thermostat control.
NOTE: V is optional, depending on local codes. If a V type
valve is used, it is mandatory that a thermal
expansion tank be installed as shown. Otherwise,
dangerous high pressures could result or water
heater safety relief valve will frequently expel water.
If no V device is used, no thermal expansion tank is
required.
Space Heating (Figures 5, 6, 7 and 8)
Boilers must operate at a water temperature higher than the
desired temperature in the heating system in order to perform
at maximum efficiency. Example: radiant floor heating.
Mixing Applications (Constant Supply
Temperature)
Fig. 4. Single Loop.
WATER USE FIXTURES
TO DISHWASHER
IF PERMITTED
BY CODES
PUMP
RECIRCULATION
AMX
SERIES
ALLOWABLE
SERVICE
VALVE
LOCATION
COLD
WATER
SUPPLY
HONEYWELL
EXPANSION
TANK
WATER
HEATER
C
H
M
HEAT
TRAP
6“
(1)
(1)
(1)
M22884
WATER USE FIXTURES
TO DISHWASHER
IF PERMITTED
BY CODES
SPARCO
PUMP
RECIRCULATION
(IF NO RECIRCULATION
IS REQUIRED OMIT
DASHED PIPING)
AMX
SERIES
ALLOWABLE
SERVICE
VALVE
LOCATION
COLD
WATER
SUPPLY
HONEYWELL
EXPANSION
TANK
CONNECTIONS
TO SIDE TAP
WATER HEATER
CONNECTIONS TO
CONVENTIONAL
WATER HEATER
WATER
HEATER
C
H
M
HEAT
TRAP
6“
8“ MAX
FAN COIL
FAN COIL
(1)
(1)
M22885
HONEYWELL
SUPERVENT
AMX SERIES
(2)
HONEYWELL
EXPANSION
TANK
HEAT
SOURCE
(BOILER,
WATER,
HEATER,
ETC.)
PUMP
HONEYWELL
ZONE VALVES
RADIENT
FLOOR LOOP
A
C
Z
Z
H
M
Z
M22886