lp-657 Rev. 001 Rel. 000 Date 12.10.18
4
Table of Contents
Part 1 - General Safety Information
5
A. Improper Combustion
6
B. Gas
6
C. When Servicing the Boiler
6
D. Boiler Water
6
E. Freeze Protection
6
F. High Elevation Installations
6
Part 2 - Before You Start
6
A. What’s in the Box
6
B. How the Boiler Operates
6
C. Optional Equipment
7
Part 3 - Prepare the Boiler
7
A. Locating the Boiler
8
B. Structure
8
C. Leveling
8
D. Clearances for Service Access
9
E. Wall Mounting Considerations
9
F. Wall Mounting Instructions
9
1. Mounting to a Wood Studded Wall
10
2. Mounting to a Metal Frame
10
G. Residential Garage and Closet Installations
10
H. Exhaust Vent and Intake Pipe
10
1. Direct Vent of Exhaust and Intake
11
2. Power Venting, Indoor Combustion Air in Confined or Unconfined
Space
11
I. Carbon Monoxide Detectors
11
J. Prevent Combustion Air Contamination
11
K. Removing a Boiler from a Common Vent System
12
L. Water Chemistry Requirements*
12
M. Technical Specifications
14
Part 4 - Piping
15
A. General Plumbing Information
15
B. Relief Valve
16
C. Backflow Preventer
16
D. Potable Expansion Tank
16
E. Circulators
16
F. Hydronic Piping with Circulators, Zone Valves, and Multiple
Boilers
16
G. Circulator Sizing
17
H. Check / Control Water Chemistry
19
I. Plumbing
19
The hydronic supply and return connections of these products
are for installation in closed loop systems ONLY!
Use of this
product in any manner other than described in this manual may
result in premature product failure, substantial property damage,
severe personal injury, or death. Damage or failure of this product
(or the system in which it is installed) due to unauthorized use
IS
NOT COVERED BY WARRANTY.
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy Policy and
Conservation Act, HTP has provided this boiler with multiple
features designed to save energy by reducing the boiler water
temperature as heating load decreases.
These features include:
•
A modulating combustion system that adjusts firing rate
based on heat demand.
•
Adjustment of boiler set point based on inferred heat
load as determined by an outdoor sensor. The outdoor
sensor is supplied by HTP with this boiler.
•
This boiler does not include a standing pilot.
•
This boiler is designed and shipped to assure the highest
efficiency operation possible. Such high efficiency is
achieved by limiting heating circuit water temperature to
140°F when there is no anticipated heat load, based upon
the outdoor sensor and the Outdoor Reset Curve (sensor
response curve) in the boiler software.
•
This feature may be over-ridden as described below in
specific installations:
•
The boiler control is equipped with an outdoor sensor
override for use with building management systems or in
cascaded systems (for systems with total input of 300,000
BTU/hr or greater).
See statement below for an important notice on the use of the
override.
IMPORTANT
In accordance with Section 325 (f) (3) of the Energy Policy and
Conservation Act, this boiler is equipped with a feature that
saves energy by reducing the boiler water temperature as
the heating load decreases. This feature is equipped with an
override which is provided primarily to permit the use of an
external energy management system that serves the same
function. THIS OVERRIDE MUST NOT BE USED UNLESS AT LEAST
ONE OF THE FOLLOWING CONDITIONS IS TRUE:
•
An external energy management system is installed that
reduces the boiler water temperature as the heating load
decreases.
•
This boiler is not used for space heating.
•
This boiler is part of a modular or multiple boiler system
having a total input of 300,000 BTU/hr or greater.
•
This boiler is equipped with a tankless coil.
The CSD-1 ASME Code, Section CW-400 requires that hot water
heating and supply boilers have a) a UL 353 temperature control
device, b) at least one (1) temperature-actuated control to shut
off the fuel supply when system water reaches a preset operating
temperature, c) a high temperature limit control that prevents
the water temperature from exceeding the maximum allowable
temperature by causing a safety shutdown and lockout, and d) its
own sensing element and operating switch.
The temperature control system integrated into the 926
control provided with this heating appliance complies with the
requirements of CSD-1 Section CW-400 as a temperature operation
control. The control monitors the temperature difference between
the inlet and the outlet sensor, which is affected by boiler water
flow. If this temperature difference exceeds 55°F (typically
because of low water flow or very low heat load), the control will
reduce the maximum fan speed. If the temperature difference
exceeds 60°F, the control will effectively sense there is little or no
water flow or heat load and shut the boiler down. The controller
will restart automatically once the temperature difference has
dropped below 55°F and the minimum off time (anti-cycle time)
has expired. In addition, if the control senses that the outlet
water temperature has reached 210°F, the boiler is put into a hard
lockout and requires manual reset to restart.
Summary of Contents for Elite FT EFT-285
Page 22: ...lp 657 Rev 001 Rel 000 Date 12 10 18 22 Figure 9 Piping Symbol Legend ...
Page 41: ...lp 657 Rev 001 Rel 000 Date 12 10 18 41 Figure 31 Internal Connection Diagram ...
Page 66: ...lp 657 Rev 001 Rel 000 Date 12 10 18 66 Figure 36 Cabinet Replacement Parts ...
Page 69: ...lp 657 Rev 001 Rel 000 Date 12 10 18 69 Maintenance Notes ...