lp-445-r4 Rev. 006 Rel. 027 Date 7.21.20
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
7
B. Flooring
8
C. Leveling
9
D. Clearances for Service Access
9
E. Residential Garage and Closet Installations
9
F. Exhaust Vent and Intake Pipe
9
1. Direct Vent of Exhaust and Intake
10
2. Indoor Combustion Air in Confined or Unconfined Space
10
G. Carbon Monoxide Detectors
10
H. Prevent Combustion Air Contamination
10
I. Removing a Boiler from a Common Vent System
11
J. Water Chemistry Requirements*
11
K. Technical Specifications
13
Part 4 - Piping
14
A. General Plumbing Information
14
B. Relief Valve
14
C. Backflow Preventer
14
D. Expansion Tank
14
E. Circulators
15
F. Hydronic Piping with Circulators, Zone Valves, and Multiple Boilers
15
G. Circulator Sizing
16
H. Check / Control Water Chemistry
17
I. Plumbing
18
J. Fill and Purge Heating System
18
K. Freeze Protection Fluids
18
L. Zoning with Zone Valves
18
M. Zoning with Circulators
18
N. Multiple Boilers
18
O. Applications*
19
Part 5 - Venting
21
A. General
21
B. Approved Materials for Exhaust Vent and Intake Pipe
22
C. Additional Requirements for Installation in Canada
22
D. Exhaust Vent and Intake Pipe Location
23
E. Exhaust Vent and Intake Pipe Sizing
24
F. Longer Vent Runs
24
G. Exhaust Vent and Intake Pipe Installation
24
H. Applications
25
1. Direct Vent Installation of Exhaust and Intake
25
2. Room and Indoor Combustion Ventilation Requirements
28
Part 6 - Condensate Removal
29
Part 7 - Wiring
30
A. Installation Must Comply With
30
B. Field Wiring Terminations
30
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.
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.
Содержание MODCON500 FS
Страница 34: ...lp 445 r4 Rev 006 Rel 027 Date 7 21 20 34 Figure 26 Cascade Master and Follower Wiring ...
Страница 61: ...lp 445 r4 Rev 006 Rel 027 Date 7 21 20 61 Figure 34 Water Side Replacement Parts All Models ...
Страница 62: ...lp 445 r4 Rev 006 Rel 027 Date 7 21 20 62 Figure 35 Cabinet Replacement Parts All Models See Table ...
Страница 65: ...lp 445 r4 Rev 006 Rel 027 Date 7 21 20 65 Maintenance Notes ...