LP-719 Rev. 000 Rel. 000 Date 6.25.20
4
Table of Contents
Part 1 - General Safety Information
5
A. Operation and Installation Warnings
5
B. Improper Combustion
6
C. Gas
6
D. When Servicing the Boiler
6
E. Boiler System
7
F. CH and DHW Loop Water Chemistry Requirements
7
G. Freeze Protection
7
H. Water Temperature Adjustment and Scalding
8
I. High Elevation Installations
8
Part 2 - Before You Start
9
A. What’s in the Box
9
B. Optional Equipment
10
Part 3 - Prepare the Boiler for Installation
10
A. Locating the Boiler
10
B. Leveling
11
C. Clearances for Service Access
11
D. Wall Mounting Considerations
12
E. Wall Mounting Instructions
12
1. Mounting to a Concrete Wall
12
2. Mounting to a Wood Studded Wall
12
F. Residential Garage and Closet Installations
12
G. Exhaust Vent and Intake Pipe
13
1. Direct Vent of Exhaust and Intake
13
2. Power Venting, Indoor Combustion Air in Confined or Unconfined
Space
13
H. Carbon Monoxide Detectors
13
I. Prevent Combustion Air Contamination
14
J. Removing a Boiler from a Common Vent System
14
K. Technical Specifications
15
Part 4 - Water Piping
19
A. General Plumbing Information
19
B. Backflow Preventer
19
C. Expansion Tank
19
D. Piping the Boiler
19
E. Internal Circulation Pump
21
F. CH and DHW Pressure Relief Valves
21
G. Air Elimination Device
22
H. Low Water Cut-Off (Field Supplied)
22
I. Applications*
22
J. Floor Drying Function
29
Part 5 - Venting
30
A. General
30
B. Approved Materials for Exhaust Vent and Intake Pipe
31
C. Additional Requirements for Installation in Canada
31
D. Exhaust Vent and Intake Pipe Location
32
E. Exhaust Vent and Intake Pipe Sizing
33
F. Tightening Boiler Collar to Exhaust Vent and Intake Pipe 33
NOTICE
WARNING
!
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 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 Slope (sensor
response slope) 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.
ASME CSD-1, Section CW-400 requires the temperature controls of
hot water heating boilers to
a) be accepted by a nationally recognized testing agency to
conform to UL 353,
b) shutoff the fuel supply when the system water reaches a
preset operating temperature,
c) have a high temperature limit control that prevents the
water temperature from exceeding the maximum allowable
temperature by causing safety shutdown and lockout.
The temperature controls of this boiler have been accepted by
a nationally recognized testing agency to conform to UL 353;
they work to shutoff the fuel supply when the system water
temperature reaches the preset operating temperature; and they
cause a safety shutdown and lockout, requiring a manual reset to
start, when the water temperature reaches 212°F.
NOTICE
