resideo Aquastat L8148A Instructions D'installation

L8148A,E,J
Aquastat® Relays
APPLICATION
The L8148A,E,J Aquastat
controllers for use with forced hydronic heating
systems. The combination high limit and intermediate
switching relay works with a low voltage (24V)
thermostat to control burner and circulator circuits. A
call for heat by the thermostat starts both the burner
and the circulator. When boiler-water temperature
exceeds the high-limit settings, the burner circuit is
broken; the circulator continues to operate during the
thermostat call for heat.
The L8148A controls line-voltage burner circuits; the
L8148E,J control low-voltage burner circuits; the
L8148J controls millivoltage burner circuits. All models
control line-voltage circulator circuits.
L8148A,E,J have provisions for adding low-limit
controllers; L8148E,J can power valves in multizone
systems.
L8148E is available with a plug and 50 VA transformer
for use with Resideo Smart Valve SV9500/SV9600.
SPECIFICATIONS
Electrical Ratings:
Table 1. Circulator Control Circuit (A):
Type
Full Load 7.4
Locked Rotor 44.4
Table 2. Burner Control Circuit:
Model No. Voltage
L8148A Line
L8148E,J Low
Scale Range: 140°F to 240°F (60°C to 116°C) or 180°F to
240°F (82°C to 116°C).
Differential: Nonadjustable.
High Limit Dial Stop: Adjustable.
®
Relays are immersion-type
120 Vac 240 Vac
3.7
22.7
Electrical Rating
Same as circulator control
circuit.
0.8A maximum at 24 Vac.
INSTALLATION INSTRUCTIONS
Maximum Pressure on Immersion Well: 255 psi
(1758 kPa).
Maximum Ambient Temperature: 150°F (66°C) with
1.2A, 24V load; 77°F (25°C) with 1.4A, 24V load.
Maximum Bulb Temperature: 40°F over setpoint, up to
265°F (4°C over setpoint, up to 129°C).
Thermostat Heat Anticipator Setting: 0.2A.
Material Safety Data Sheets (MSDS): For information on
heat-conductive compound, see form number
69-0955.
INSTALLATION
When Installing This Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable
for your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
WARNING
Explosion Hazard.
Can cause severe injury, death or property
damage.
This product is intended for use only in systems
with a pressure relief valve.
WARNING
Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
1. Disconnect power supply before beginning
installation to prevent electrical shock or
equipment damage.
2. Never apply a jumper across (or short)
terminals B1, B2, or B3. This burns out the
transformer.
95-6940EF-01