Electrical; External Modular Boiler Controls - Burnham ALPINE Installation, Operation And Service Instructions

X. Modular installation (continued)
WaRning
if gas pressure in the building is above ½ psig,
an additional gas pressure regulator is required.
Using one additional regulator for multiple
boilers may result in unsafe boiler operation.
The additional regulator must be able to properly
regulate gas pressure at the input of the smallest
boiler. if the regulator cannot do this, two or
more additional regulators are required. Consult
regulator manufacturer and/or local gas supplier
for instructions and equipment ratings.
E.

Electrical

Refer to Section VIII "Electrical" of this manual for:
1. Individual module (boiler) wiring specific details
2. Individual module (boiler) internal wiring details,
high and low voltage connections
6
Each individual module (boiler) must be provided with own
fused disconnect and own service switch.
Install modular boiler wiring in accordance with requirements of
authority having jurisdiction. In absence of such requirements,
follow the National Electric Code, NFPA 70 and/or CSA C22.1
Electric Code.
External Modular Boiler Control System
F.
As an alternate to the Sage2.1 Control internal
sequencer, the Sage2.1 Control also accepts an input
from an external sequencer. Follow modular boiler
control system manufacturer (Honeywell, Tekmar, etc.)
instructions to properly apply a modular control system.
The Tekmar Model 264 and Model 265 based control
wiring diagrams (Figures 44A and 44B) are provided as
examples of typical modular boiler control systems.