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Benchmark 750-3000 Installation & Startup Manual
SECTION 2 – INSTALLATION
When optional accessories are ordered, they may be packed within the unit's shipping
container, factory installed on the unit, or packed and shipped in a separate container. Any
standard or optional accessories shipped loose should be identified and stored in a safe place
until ready for installation or use.
2.4 SITE PREPARATION
Ensure that the site selected for installation of the Benchmark Boiler includes:
•
Access to AC input power specified in Section 2.10.1.
•
Access to natural gas or propane gas with minimum pressure specified in Section 2.9.1.
2.4.1 Installation Clearances
All Benchmark models are the same height, but vary in depth according to model pairs;
750/1000, 1500/2000, and 2500/3000. The unit must be installed with the prescribed clearances
for service as shown in Figure 2-1a, 2-1b and 2-1c. The minimum clearance dimensions,
required by AERCO, are listed below for all models. However, if Local Building Codes require
additional clearances, these codes shall supersede AERCO's requirements. The minimum
acceptable clearances required are as follows:
• Sides: 24 inches (61 cm)
• Front: 24 inches (61 cm)
• Rear: 24 inches (61 cm)
• Top:
18 inches (45.7 cm)
All gas piping, water piping and electrical conduit or cable must be arranged so that they do not
interfere with the removal of any panels, or inhibit service or maintenance of the unit.
In multiple unit installations, it is important to plan the position of each unit in advance. Sufficient
space for piping connections and future service/maintenance requirements must also be taken
into consideration. All piping must include ample provisions for expansion.
NOTE:
Benchmark 750 – 3000 units may be installed with zero side clearances in pairs only. The
perimeter clearances still apply. See drawings in Appendix A: Dimensions and Clearance
Drawings.
If installing a Combination (CCP) system using an ACS panel, it is important to identify the
Combination Mode Boilers in advance and place them in the proper physical location. For
information on Combination Mode Boilers refer to Section 3.7 of the Benchmark 750 – 3000
Boiler Operation and Maintenance Guide, OMM-0116 (GF-201).
•
•
OMM-115_D
GF-200
5/9/2019
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