QHT Boiler User Manual
Riva
HEAT ONLY & COMBI BOILER
Please Read This Guide Carefully
and
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- This guide is intended to provide
detailed information regarding venting
components and installation.
- This guide must be used in conjunction
with the boiler installation manual.
Non-Condensing Vent
Component & Installation Guide
Prepared by:
QHT, Inc.
Portsmouth, NH
603-334-6400 phone
www.qhtinc.com
Rev. B 04.08.08
2
Table of Contents:
Restrictor Sizing Chart …………………...…………………………………. 4
External Vent Warnings ………………………………………………………. 4
External Vent Clearances ……………………………………………………. 5
Concentric Riser Kit - RI VC RIS 9990322 …………………………………. 6
Concentric Riser Kit Installation Instructions ………………………………. 7-9
Standard Concentric Kit - RI VC 9990148 …………………………………. 10
Standard Concentric Kit Installation Instructions ………………………….. 11-12
Concentric Vent Accessories ………………………………………………... 13
RI VC EXT - 9990149
RI VC 90 - 9990152
RI VC 45 - 9990153
Separate Kit - RI VS 8990016 ……………………………………………….. 14
Separate Kit Installation Instructions ……………………………………….. 15-16
Separate Vent Accessories ………………………………………………….. 17
RI VS EXT 9990159
RI VS 90F 9990160
RI VS 45 9990162
RI VS 90M 9990178
Vertical Roof Vent Kit - RI RV 9990251 …………………………………… 18
Vertical Roof Vent Kit Installation Instructions …………………………… 18-20
Vertical Roof Vent Accessories ……………………………………………. 21
RI RV EXT 9990242
RI RV 90 9990256
RI RV 45 9990255
RI RV CC 9990275
Vertical Roof Vent Accessories Cont. …………………………………….. 22
RI RV CS 9990276
RI RV FF 9990280
RI RV PF 9990252
3
Restrictor Sizing Chart
Vent Type Length (ft ) R estrict or Size
1.65 to 3.3 41
Concentric
1.65 (in) and 1.65 (out) 38
Separate
3.3 to 39.40 ( tot. in + out) 41
39.40 to 131 (t ot. i n + out) N o ne
Vertical 3.3 to 27.8 None
Exterior Vent Warnings
EXTERNAL VENT SURFACES ARE HOT.
3.3 to 8.8 44
8.8 to 32.8 None
CAUTION
IT IS THE RESPONSIBILITY OF THE HOMEOWNER TO KEEP THE VENT
TERMINAL CLEAR OF SNOW AND ICE.
NOTE: USE ONLY LISTED COMPONENTS SUPPLIED WITH THE BOILER.
SURFACE DISCOLORATION OF THE BUILDING MAY OCCUR DUE TO
IMPROPER INSTALLATION. QHT, INC. WILL NOT ACCEPT RESPONSIBILITY
OF LIABILITY FOR SUCH DISCOLORATION.
4
Exterior Vent Clearances
The Exhaust Hood should be installed on the leeward side of the house and conform to the
following guidelines:
1. The vent hood shall not be less than 3 feet above any forced air inlet to the house.
2. The vent hood shall not be less than 1 foot below, 1 foot horizontally, or 1 foot above any door,
window or gravity inlet into any building.
3. The vent hood shall not be less than 2 feet from an adjacent building.
4. The vent hood shall be not less than 7 feet above grade when located adjacent to a public
walkway.
5. The vent hood shall be located so that flue gasses are not directed to jeopardize people,
overheat combustible structures, materials or enter buildings.
6. Minimum of 4’ horizontal clearance from electric meters, gas meters, regulators and relief
equipment.
7. Care should be taken to ensure the rubber gaskets in ALL vent joints are properly
assembled to prevent leakage of products of combustion in the building.
8. Avoid installing exhaust the hood on the North, West, or the side of the house receiving the
prevailing winds.
5
Concentric Riser Vent Kit - RI VC RIS - 9990322
Components included in kit:
A. EXHAUST GASKET (4)
B. UNION CLAMP (3)
C. RISE EXHAUST PIPE (18”)
D. RISE INTAKE PIPE (20”)
E. UNION GASKET (3)
F. FLANGE GASKET (1)
G. FLANGE SCREWS (4)
H. BOILER COLLAR (1)
I. UNION CLAMP SCREWS (6)
J. 90 DEG ELBOW (1)
K. INTAKE TERMINATION (38”)
L. EXHAUST TERMINATION (40”)
M. WALL GASKET (2)
Notes:
Length 1’ to 32.8’ equivalent length
90 Elbow = 5.4’ equivalent length
45 Elbow = 3’ equivalent length
6
Concentric Riser Vent Kit Installation
Pipe connections (Figure 1):
Whenever joining concentric pipe cut the inner
exhaust pipe so it is 1 inch long than the outer
intake pipe.
Figure 1
Termination Location / Installation
:
The concentric termination piece is installed
by sliding the outer intake pipe through the
wall from inside the building (shown in figure
2). The inner exhaust pipe is then slid into the
intake pipe until the termination cap bottoms
out on the end of the intake pipe.
Note: The termination should be pitched 3°
downward (2” down per 39” length) away from
the boiler. As shown in Figure 3.
Concentric Riser Kit components
:
Figure 4 depicts the concentric riser kit
components and dimensions. The vertical
and horizontal sections can be cut to length
(from the male end) during installation.
Additional pipe or elbows can be purchased
separately. Refer to page 6 for the relevant
part numbers.
Figure 2
6”
39”
42”
19 3/4”
1/8”
3 3/4”
18”
3° Downward pitch
(2” per 39” length).
Away from boiler
Figure 3
3 3/4”
1/4”
1/4”
Exhaust Gasket Installation
:
Install the red exhaust o-ring gaskets (A) into
each of the vent components female ends as
shown in Figure 5. Be sure to install the
gaskets so the beveled rings are oriented as
shown in Figure 5.
Figure 4
Figure 5
7
Concentric Riser Vent Kit Installation Cont.
Intake Gasket Installation :
Install the intake gaskets (E) on the intake
pipes as shown in Figure 6.
Figure 6
Vertical Rise Installation
• Install the flange gasket (F) onto the boiler
outlet as shown in Figure 7.
• Attach the boiler collar (H) to the outlet of
the boiler using the 4 screws (G).
• Insert the vertical exhaust pipe (C) into
the boiler collar. (Be careful not to
damage the red exhaust gasket)
• Slide the air intake pipe (D) onto the boiler
collar so that the intake gasket (E) fits
over the intake collar (H).
• Install the elbow (J) onto the vertical rise
pipe.
Intake Pipe Clamp Installation
Install the intake pipe clamps (B) on the intake
gaskets (E) as shown in Figure 8, using
attachment screws (I)
:
:
Figure 7
Termination Installation
• Install the wall gaskets (M) on the
termination pipe (K). One gasket from the
inside of the wall and one from the
outside.
• Install the intake gasket (E) on the
termination pipe (K)
:
Figure 8
Figure 9
8
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