Beckett 7600 AquaSmart Boiler Control - Manual (Page 12)

12
Wiring the AquaSmart Control
○ Consult the appliance wiring diagrams to check the
manufacturer’s specifications.
○ Refer to Figure 12 through Figure 17 for some
typical wiring diagrams.
○ Verify the wires are still labeled correctly and make
connections to the appropriate terminals on the
control wiring terminal strip.
○ Provide disconnect means and overload protection
as required on power supply.
○ Connect control conduit bracket to earth ground
using the supplied grounding screw.
○ B1 terminal is a 1/4 in. tab terminal (quick connect).
Water Flow Symbols Key (Figures 12 through 17)
Z
- Air Vent
- Air Separator
- Expansion Tank
- Isolation Valve
- Pressure Regulator
- Zone Valve
- Check Valve
- Circulator
Some Thermostats Are
Polarity Sensitive
Reversed polarity could cause erratic cycling of
the boiler control.
y Connect the red thermostat wire (from the RH or
R terminal of the thermostat) to the T R terminal on
the control.
y Connect the white thermostat wire (from the W
terminal of the thermostat) to the T W terminal on
the control.
7600B only: TERMINALS TR (Z or
hot) and B2 (TV or ground) offer a
24-volt supply for operating other 24 VAC equipment on the
boiler. IMPORTANT: TO PREVENT DAMAGE TO THE
CONTROL, DO NOT OVERLOAD THE TRANSFORMER.
The AquaSmart is equipped with a 30VA transformer. Make
sure that the total load, including the burner circuit and TR
& B2 connections do not exceed 30VA. See Figure 11.
How to calculate VA - Add all AMP ratings of 24VAC
components in this circuit and multiply sum by 24 volts.
(Example: .4 + .4 + .2 + .2 = 1.2A x 24V = 28.8 VA)
Figure 11 - TR, B2, & Vent Damper Connections
TR
B2
6-Position Vent
Damper Receptacle
7600B only: When being retrofitted
into existing applications, the 7600B
may be replacing a control that required an external
transformer for operating other 24 VAC equipment (the
7600B is equipped with an internal 30VA transformer).
Ensure that any existing transformers are either completely
removed from the system or wired according to Figures 14
or 17 of this manual (if additional transformers are still
needed not to exceed the 7600B’s 30VA rating).
Otherwise, the transformers may contend with, short out,
and/or damage each other.
When powering multiple circulators
from the C1 and C2 terminals, take
extra care not to exceed the output’s reading. If the sum of
the full load amps of all the circulators exceeds the output’s
rating, use the C1 and C2 terminals to power the coil of a
multiple-pole contactor; the contacts of which can be wired
to switch L1 to each circulator .
Observe proper polarity when wiring
L1 and L2. If polarity is reversed, a
call for heat on the ZR input may not be recognized.
To wire a vent damper to the 7600B,
first remove jumper plug from 6-position
receptacle and then connect 6-pin connector of the vent
damper to the receptacle. See Figure 11. Once the 7600B
is operated with a vent damper, it will not function without one
(even if the jumper plug is replaced). The first time a 7600B
is operated with a vent damper, a fuse will pop. It is normal
for this to be audible and even create a little smoke and does
not indicate something is wrong with the control.