Bosch ESHCK User manual

Installation manual
Concentric Vent / Air Intake Kit
Stainless Steel
For Bosch Models: GWH 715 ES, GWH 2400 ES, GWH 2700 ES, Evolution 500
Part Number: ESHCK

2| Installation Manual
Stainless Steel - Concentric Vent / Air Intake Kit Installation Manual | 10.2009
Technical specications are subject to change without prior notice

Stainless Steel - Concentric Vent / Air Intake Kit Installation Manual | 10.2009 Technical specications are subject to change without prior notice
| 3
Installation Manual
Table of Contents
1 Introduction 4
1.1 Items included with Concentric vent kit 4
1.2 Venting material compatibility 4
2 Installation 5

4| Installation Manual
Stainless Steel - Concentric Vent / Air Intake Kit Installation Manual | 10.2009
Technical specications are subject to change without prior notice
1 Introduction
CAUTION:
The following is not a substitute for the tankless
water heater installation manual. The entire
installation must conform with the specications
listed in the tankless water heater installation
manual.
The following stainless concentric vent kit is designed to
provide one penetration point through the exterior wall for
both combustion air and exhaust vent piping. This kit is
only for horizontal sidewall terminations. It is not approved
for through the roof, vertical terminations. The stainless
concentric vent kit is compatible with the following Bosch
tankless water heaters:
• GWH 2400 ES
• GWH 2700 ES
• GWH 715 ES
• Evolution 500
1.1 Items included with Concentric Vent kit:
See Figure 1
Fig. 1 Concentric vent kit components
Item 1
Item 2
Item 3
• Item 1 - intake pipe connector
• Item 2 - exterior wall chase
• Item 3 - bag of screws
This kit can be ordered from your local supplier
(part# ESHCK).
1.2 Venting material compatibility
The exhaust vent piping used with this kit must be 3" sealed
single wall stainless steel (AL29-4C). The combustion air
piping used with this kit must be 3" sealed PVC or any other
rigid pipe.
Only tee terminals are approved for use with the
concentric vent / air intake kit (see Table 1).
A p p r o v e d
terminals
Manufacturer part numbers
Z-ex Protech Heat Fab
3" Tee
Terminal
2SVSTTF03 FSTT3 9390TEE
Table 1 Approved Tee Terminals
The exhaust vent piping and tee terminal used with
the kit must be from the same vent pipe
manufacturer.
1.3 Concentric Vent kit dimensions
19"
15"
3"
3"
5"
5" 8"
Fig. 2 Concentric Vent kit dimensions

Stainless Steel - Concentric Vent / Air Intake Kit Installation Manual | 10.2009 Technical specications are subject to change without prior notice
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Installation Manual
2 Installation
1. Ensure all items listed in Section 1.1 are complete.
2. Common installation practice is to determine the
termination and exterior wall penetration point rst.
Next, design the venting/intake piping layout back to
the heater. Keep in mind, centrally locating the water
heater, whenever possible, is recommended to keep hot
water distribution times even thoughout the structure.
3. To determine the appropriate penetration point, refer to
the allowable termination clearances listed in Figure 7.
4. Once penetration point is determined, use a 5" hole saw
with proper blade (depending on wall construction) to
cut hole for kit installation.
5. Insert Item 2 (Fig. 1) through exterior wall from the
outside until ange is ush with wall surface. Ensure
that combustion air openings on Item 2 face toward the
ground as shown in Fig. 6. Secure ange to exterior wall
with screws provided.
6. Connect item 1 to item 2 (Fig. 1) from inside the
structure. The air intake connection opening (Item 1)
can be turned to best suit the connection of the intake
pipe. Secure both items with machine screws provided.
7. Locate end clamps on concentric kit (Fig. 3, step 1).
Open clamps as shown in Figure 3, step 2.
Concentric Kit End
Exhaust
vent pipe
Step 1
Step 2
Fig. 3 Concentric end clamps
8. Insert vent piping through the concentric vent kit. Close
end clamps around vent pipe (Fig. 4, step 3). Secure
clamps by inserting screws where shown (Fig. 4, step 4).
Concentric Kit End
Exhaust
vent pipe
Step 3
Step 4
Exhaust
vent pipe
Fig. 4 Securing vent piping with clamps
9. On the outside of the structure, connect tee terminal to
exhaust vent pipe (Fig. 5). Be sure to maintain 12"
clearance from exterior wall to tee terminal as indicated
in Figure 6.
3" sealed stainless steel
(AL29-4C) exhaust pipe
Concentric vent kit
Approved tee
terminal
Air intake
connection
Fig. 5 Concentric vent assembly
10. Connect combustion air piping to air intake connection
on concentric vent kit (Fig. 5). Secure with machine
screws.

6| Installation Manual
Stainless Steel - Concentric Vent / Air Intake Kit Installation Manual | 10.2009
Technical specications are subject to change without prior notice
10. Finish exhaust vent and combustion air piping installation
back to the water heater.
11. Complete tankless water heater installation per the water
heater’s installation manual (Fig. 6).
12"
Combustion
air pipe
Exhaust
vent
pipe
Combustion
air openings
Fig. 6 Completed concentric vent kit installation

Stainless Steel - Concentric Vent / Air Intake Kit Installation Manual | 10.2009 Technical specications are subject to change without prior notice
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Installation Manual
* For clearances not specified in ANSI Z223.1 / NFPA54 or CSA-B149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing in accordance with section 2.20, or;
b) A reference to the following footnote:
“Clearance in accordance with local installation codes and the requirements of the gas supplier.”
Canadian installations
1)
U.S. installations
2)
A Clearance above grade, veranda, porch, deck or balc
.ni21
.ni 21
yno
B
ni63denepoebyamtahtroodrowodniwotecnaraelC
.ni21.
C Clearance to permanently closed window * *
D Vertical clearance to ventilated soffit located above the vent
terminator within a horizontal distance of 2 feet (61cm) from the
center line of the terminator
* *
E Clearance to unventilated soffit * *
F Clearance to outside corner * *
G Clearance to inside corner * *
H Clearance to each side of center line extended above meter/
regulator assembly
36 in. within a height 15 feet above
meter/ regulator assembly
*
I Clearance to service regulator vent outlet 36 in. *
J Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other application
.ni21.ni63
K Clearance to mechanical air supply inlet teef01nihtiwfievoba.ni63.ni27
horizontally
L Clearance above paved sidewalk or paved driveway located on
public property
84 in.
3)
*
M ni21ynoclabrokcedhcrop,adnarevrednuecnaraelC .
4)
*
1) In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code
2) In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code
3) A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
4) Permitted only if veranda, porch, deck or balcony
is fully open on a minimum of two sides beneath the floor.
Fig. 7 Required direct vent terminal clearances (twin pipe / concentric penetration)

Bosch Thermotechnology Corporation
50 Wentworth Avenue
Londonderry, NH 03053
Tel.: [phone]
Fax: [phone]
www.boschhotwater.com
Bosch Thermotechnology Corporation reserves the right to
make changes without notice due to continuing engineering
and technological advances.
BTC 710003302 A